Trial Outcomes & Findings for A Crossover Study on the Blinding Effect of a New Pragmatic Placebo Needle (NCT NCT01948375)

NCT ID: NCT01948375

Last Updated: 2018-01-09

Results Overview

The primary outcome was the proportion of volunteers'perception of needle penetration between the placebo needle and the real needle in the third acupuncture session in each period. LI4, on the dorsum of the hand, between the first and second metacarpal bones, approximately in the center of the second metacarpal bone; RN12, on the upper abdomen,4 cun above the umbilicus,on the anterior midline; BL36, on the back of the thigh,on the midpoint of the inferior gluteal crease; BL25, on the loin, 1.5 cun lateral to the lower border of the spinous process of the fourth lumbar vertebra.

Recruitment status

COMPLETED

Study phase

NA

Target enrollment

60 participants

Primary outcome timeframe

in the third acupuncture session in each period

Results posted on

2018-01-09

Participant Flow

Volunteers were recruited from Guang'anmen Hospital of China Academy of Chinese Medical Sciences via poster advertisements between August 2013 and December 2013.

Participant milestones

Participant milestones
Measure
Real Needle- Placebo Needle
Participants will accept acupuncture with real acupuncture needle in the first period, and pragmatic placebo needle in the second period of the trial. real needle- placebo needle: Participants will accept acupuncture with real needle in the first period and pragmatic placebo needle in the second period. Acupoints are to be needled 1 cun by real needle in the first period, and pressed against the skin with no penetration by placebo needle in the second period. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants will be asked questions on skin penetration of needles, needling pain and needle sensation. The acupuncture treatment is given every other day. There are three sessions for each kind of needle, six sessions in total for each participant. There is a two-day interval between two kinds of interventions.
Placebo Needle - Real Needle
Participants will accept acupuncture with pragmatic placebo needle in the first period, and real acupuncture needle in the second period of the trial. placebo needle - real needle: Participants will accept acupuncture with pragmatic placebo needle in the first period, and real needle in the second period. Acupoints will be needled with no penetration of the skin by placebo needle, while 1 cun by real acupuncture needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants will be asked questions on skin penetration of needles, needling pain and needle sensation. The acupuncture treatment is given every other day. There are three sessions for each kind of needle, six sessions in total for each participant. There is a two-day interval between two kinds of interventions.
Overall Study
STARTED
30
30
Overall Study
COMPLETED
30
30
Overall Study
NOT COMPLETED
0
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

A Crossover Study on the Blinding Effect of a New Pragmatic Placebo Needle

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo Needle - Real Needle
n=30 Participants
Participants received acupuncture with pragmatic placebo needle in the first period, and with real acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Real Needle - Placebo Needle
n=30 Participants
Participants received acupuncture with real needle in the first period, and with pragmatic placebo acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Total
n=60 Participants
Total of all reporting groups
Age, Continuous
49.47 years
STANDARD_DEVIATION 14.54 • n=5 Participants
48.90 years
STANDARD_DEVIATION 16.74 • n=7 Participants
49.18 years
STANDARD_DEVIATION 15.55 • n=5 Participants
Sex: Female, Male
Female
19 Participants
n=5 Participants
11 Participants
n=7 Participants
30 Participants
n=5 Participants
Sex: Female, Male
Male
11 Participants
n=5 Participants
19 Participants
n=7 Participants
30 Participants
n=5 Participants
Region of Enrollment
China
30 participants
n=5 Participants
30 participants
n=7 Participants
60 participants
n=5 Participants
Educational level
Secondary education and the below
14 participants
n=5 Participants
16 participants
n=7 Participants
30 participants
n=5 Participants
Educational level
Tertiary education
16 participants
n=5 Participants
14 participants
n=7 Participants
30 participants
n=5 Participants
Acupuncture experience
None
7 participants
n=5 Participants
8 participants
n=7 Participants
15 participants
n=5 Participants
Acupuncture experience
1-5 sessions
13 participants
n=5 Participants
7 participants
n=7 Participants
20 participants
n=5 Participants
Acupuncture experience
6-10 sessions
0 participants
n=5 Participants
2 participants
n=7 Participants
2 participants
n=5 Participants
Acupuncture experience
>10 sessions
10 participants
n=5 Participants
13 participants
n=7 Participants
23 participants
n=5 Participants
Nervousness of acupuncture
No nervous
16 participants
n=5 Participants
14 participants
n=7 Participants
30 participants
n=5 Participants
Nervousness of acupuncture
A little nervous
7 participants
n=5 Participants
7 participants
n=7 Participants
14 participants
n=5 Participants
Nervousness of acupuncture
Very nervous
0 participants
n=5 Participants
1 participants
n=7 Participants
1 participants
n=5 Participants
Nervousness of acupuncture
no report
7 participants
n=5 Participants
8 participants
n=7 Participants
15 participants
n=5 Participants
Acupuncture discomfort (vas)
0.9 score
n=5 Participants
0 score
n=7 Participants
0 score
n=5 Participants
Familiarity with needle sensation
yes
20 participants
n=5 Participants
21 participants
n=7 Participants
41 participants
n=5 Participants
Familiarity with needle sensation
no
3 participants
n=5 Participants
1 participants
n=7 Participants
4 participants
n=5 Participants
Familiarity with needle sensation
no response
7 participants
n=5 Participants
8 participants
n=7 Participants
15 participants
n=5 Participants
Type of needle sensation ever experienced
Distention
18 participants
n=5 Participants
20 participants
n=7 Participants
38 participants
n=5 Participants
Type of needle sensation ever experienced
Soreness
16 participants
n=5 Participants
17 participants
n=7 Participants
33 participants
n=5 Participants
Type of needle sensation ever experienced
Pricking
10 participants
n=5 Participants
19 participants
n=7 Participants
29 participants
n=5 Participants
Type of needle sensation ever experienced
Numbness
9 participants
n=5 Participants
17 participants
n=7 Participants
26 participants
n=5 Participants
Acceptability of acupuncture
Very difficult to accept
0 participants
n=5 Participants
1 participants
n=7 Participants
1 participants
n=5 Participants
Acceptability of acupuncture
A little difficult to accept
0 participants
n=5 Participants
1 participants
n=7 Participants
1 participants
n=5 Participants
Acceptability of acupuncture
Acceptable
10 participants
n=5 Participants
10 participants
n=7 Participants
20 participants
n=5 Participants
Acceptability of acupuncture
Easy to accept
5 participants
n=5 Participants
5 participants
n=7 Participants
10 participants
n=5 Participants
Acceptability of acupuncture
Very easy to accept
8 participants
n=5 Participants
5 participants
n=7 Participants
13 participants
n=5 Participants
Acceptability of acupuncture
no response
7 participants
n=5 Participants
8 participants
n=7 Participants
15 participants
n=5 Participants
Preference of acupuncture
Yes
23 participants
n=5 Participants
21 participants
n=7 Participants
44 participants
n=5 Participants
Preference of acupuncture
Not sure
0 participants
n=5 Participants
1 participants
n=7 Participants
1 participants
n=5 Participants
Preference of acupuncture
no response
7 participants
n=5 Participants
8 participants
n=7 Participants
15 participants
n=5 Participants

PRIMARY outcome

Timeframe: in the third acupuncture session in each period

The primary outcome was the proportion of volunteers'perception of needle penetration between the placebo needle and the real needle in the third acupuncture session in each period. LI4, on the dorsum of the hand, between the first and second metacarpal bones, approximately in the center of the second metacarpal bone; RN12, on the upper abdomen,4 cun above the umbilicus,on the anterior midline; BL36, on the back of the thigh,on the midpoint of the inferior gluteal crease; BL25, on the loin, 1.5 cun lateral to the lower border of the spinous process of the fourth lumbar vertebra.

Outcome measures

Outcome measures
Measure
Placebo Needle - Real Needle
n=30 Participants
Participants received acupuncture with pragmatic placebo needle in the first period, and with real acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Real Needle- Placebo Needle
n=30 Participants
Participants received acupuncture with real needle in the first period, and with pragmatic placebo acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
LI4: No preference
29 participants
30 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
LI4: Preferred period 2
0 participants
0 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
RN12: Preferred period 1
0 participants
2 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
RN12: No preference
26 participants
26 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
RN12: Preferred period 2
4 participants
2 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
BL25: Preferred period 1
2 participants
4 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
BL25: No preference
26 participants
26 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
BL25: Preferred period 2
2 participants
0 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
BL36: Preferred period 1
1 participants
2 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
BL36: No preference
29 participants
27 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
BL36: Preferred period 2
0 participants
1 participants
Proportion of Volunteers'Perception of Needle Penetration Between the Pragmatic Placebo Needle and Real Needle.
LI4: Preferred period 1
1 participants
0 participants

SECONDARY outcome

Timeframe: in the third acupuncture session in each period

This questionnaire is used to collect the types and degree of needle sensation experienced by participants. Information is collected after the third acupuncture session in each period. The difference between two kinds of needles is to be analyzed.

Outcome measures

Outcome measures
Measure
Placebo Needle - Real Needle
n=30 Participants
Participants received acupuncture with pragmatic placebo needle in the first period, and with real acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Real Needle- Placebo Needle
n=30 Participants
Participants received acupuncture with real needle in the first period, and with pragmatic placebo acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Spreading:Preferred period 2
3 participants
4 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Pricking:Preferred period 1
8 participants
6 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Pricking:No preference
20 participants
17 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Pricking:Preferred period 2
2 participants
7 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Distending:Preferred period 1
1 participants
7 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Distending:No preference
20 participants
21 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Distending:Preferred period 2
9 participants
2 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Soreness:Preferred period 1
4 participants
10 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Soreness:No preference
18 participants
16 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Soreness:Preferred period 2
8 participants
4 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Spreading:Preferred period 1
3 participants
6 participants
Southampton Needle Sensation Questionnaire-Type of Needle Sensation
Spreading:No preference
24 participants
20 participants

SECONDARY outcome

Timeframe: in the third acupuncture session in each period

The degree of needle sensation between the placebo needle and the real needle were compared. The data of degree of needle sensation of the placebo needle included rows 1-4,i.e,, rows of "placebo needle:no", "placebo needle: mild", "placebo needle: moderate" and "placebo needle: severe". The data of degree of needle sensation of the real needle included rows 5-8, i.e., rows of "real needle: no", 'real needle: mild", "real needle: moderate", and "real needle: severe".

Outcome measures

Outcome measures
Measure
Placebo Needle - Real Needle
n=30 Participants
Participants received acupuncture with pragmatic placebo needle in the first period, and with real acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Real Needle- Placebo Needle
n=30 Participants
Participants received acupuncture with real needle in the first period, and with pragmatic placebo acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Real needle: Mild
11 participants
12 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Placebo needle: No
1 participants
3 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Placebo needle: Mild
14 participants
17 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Placebo needle: Moderate
15 participants
9 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Placebo needle: Severe
0 participants
1 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Real needle: No
0 participants
1 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Real needle: Moderate
16 participants
16 participants
Southampton Needle Sensation Questionnaire-Degree of Needle Sensation
Real needle: Severe
3 participants
1 participants

SECONDARY outcome

Timeframe: in the third acupuncture session in each period

The pain of acupuncture is assessed using visual analogue scale (VAS), where 0 means no pain, and 10 means the imaginable severest pain. The VAS value of each period is used to compare the difference of acupuncture pain between the placebo needle and the real needle. A lower value represented a better outcome, which indicated that needles used induced less pain.

Outcome measures

Outcome measures
Measure
Placebo Needle - Real Needle
n=30 Participants
Participants received acupuncture with pragmatic placebo needle in the first period, and with real acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Real Needle- Placebo Needle
n=30 Participants
Participants received acupuncture with real needle in the first period, and with pragmatic placebo acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Degree of Acupuncture Pain
placobo needle
3.02 units on a scale
Standard Deviation 1.87
2.73 units on a scale
Standard Deviation 1.41
Degree of Acupuncture Pain
real needle
3.70 units on a scale
Standard Deviation 2.22
3.46 units on a scale
Standard Deviation 1.98

SECONDARY outcome

Timeframe: in the third acupuncture session in each period

After the third acupuncture of each period, participants are asked to show their acceptance toward the needles with a 5-point scale: very difficult to accept, a little difficult to accept, acceptable, easy to accept, very easy to accept. The needle acceptability between the placebo needle and real needle are compared. Data of the acceptability of the placebo needle included rows 1-5, i.e., rows of "placebo needle: very difficult to accept", "placebo needle: a little difficult to accept", "placebo needle: acceptable", "placebo needle: easy to accept" and "placebo needle: very easy to accept". Data of the acceptability of the real needle included rows 6-10, i.e., rows of "real needle: very difficult to accept", "real needle: a little difficult to accept", "real needle: acceptable", "real needle: easy to accept" and "real needle: very easy to accept".

Outcome measures

Outcome measures
Measure
Placebo Needle - Real Needle
n=30 Participants
Participants received acupuncture with pragmatic placebo needle in the first period, and with real acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Real Needle- Placebo Needle
n=30 Participants
Participants received acupuncture with real needle in the first period, and with pragmatic placebo acupuncture needle in the second period. All acupoints were needled through the pad but just pressed against the skin without penetration by pragmatic placebo needle, while through the pad and into the skin 15 mm by real needle. For each intervention, LI4 and RN12 are needled first in a supine position for 15 minutes; BL36 and BL25 are needled secondly in a prone position for another 15 minutes. After withdrawal of the needle, participants were asked to give answers on perception of skin penetration, needle sensation and acupuncture pain. Acupuncture was given every other day, three sessions for one kind of needle, six sessions in total for each subject. There was a two-day interval between the applications of two kinds of needles.
Acceptability of the Acupuncture Needle
Placebo needle: very difficult to accept
0 participants
0 participants
Acceptability of the Acupuncture Needle
Placebo needle: a little difficult to accept
0 participants
1 participants
Acceptability of the Acupuncture Needle
Placebo needle: acceptable
15 participants
11 participants
Acceptability of the Acupuncture Needle
Placebo needle: easy to accept
5 participants
12 participants
Acceptability of the Acupuncture Needle
Placebo needle: very easy to accept
10 participants
6 participants
Acceptability of the Acupuncture Needle
Real needle: very difficult to accept
0 participants
0 participants
Acceptability of the Acupuncture Needle
Real needle: a little difficult to accept
2 participants
2 participants
Acceptability of the Acupuncture Needle
Real needle: acceptable
14 participants
15 participants
Acceptability of the Acupuncture Needle
Real needle: easy to accept
8 participants
8 participants
Acceptability of the Acupuncture Needle
Real needle: very easy to accept
6 participants
5 participants

Adverse Events

Real Needle- Placebo Needle

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

Placebo Needle - Real Needle

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Zhishun Liu, Director of the study

Guang'an Men Hospotal Affiliated to China Academy of Chinese Medical Sciences

Phone: 8610-010-88001124

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place