Trial Outcomes & Findings for Evaluation of Doxycycline Verses Placebo for the Treatment of Severe Nonproliferative or Mild or Moderate Proliferative Diabetic Retinopathy (NCT NCT00511875)

NCT ID: NCT00511875

Last Updated: 2018-11-02

Results Overview

Change in dark adaptation is measured as dark adaptation time at baseline measured in minutes minus dark adaptation time measured at 24 months

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

30 participants

Primary outcome timeframe

Baseline and 24 months

Results posted on

2018-11-02

Participant Flow

Participant milestones

Participant milestones
Measure
Doxycycline Monohydrate
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Placebo
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Overall Study
STARTED
15
15
Overall Study
COMPLETED
10
15
Overall Study
NOT COMPLETED
5
0

Reasons for withdrawal

Reasons for withdrawal
Measure
Doxycycline Monohydrate
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Placebo
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Overall Study
Lost to Follow-up
4
0
Overall Study
Missing variables
1
0

Baseline Characteristics

Evaluation of Doxycycline Verses Placebo for the Treatment of Severe Nonproliferative or Mild or Moderate Proliferative Diabetic Retinopathy

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=15 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Total
n=30 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Age, Categorical
Between 18 and 65 years
9 Participants
n=5 Participants
12 Participants
n=7 Participants
21 Participants
n=5 Participants
Age, Categorical
>=65 years
6 Participants
n=5 Participants
3 Participants
n=7 Participants
9 Participants
n=5 Participants
Sex: Female, Male
Female
6 Participants
n=5 Participants
6 Participants
n=7 Participants
12 Participants
n=5 Participants
Sex: Female, Male
Male
9 Participants
n=5 Participants
9 Participants
n=7 Participants
18 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=5 Participants
3 Participants
n=7 Participants
3 Participants
n=5 Participants
Race (NIH/OMB)
White
15 Participants
n=5 Participants
12 Participants
n=7 Participants
27 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Region of Enrollment
United States
6 participants
n=5 Participants
8 participants
n=7 Participants
14 participants
n=5 Participants
Region of Enrollment
Denmark
9 participants
n=5 Participants
7 participants
n=7 Participants
16 participants
n=5 Participants

PRIMARY outcome

Timeframe: Baseline and 24 months

Population: Of 10 participants who completed doxycycline treatment, usable endpoint data is only available for 8.

Change in dark adaptation is measured as dark adaptation time at baseline measured in minutes minus dark adaptation time measured at 24 months

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=8 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Dark Adaptation, Rod Intercept
0.3 minutes
Standard Deviation 3.3
-0.3 minutes
Standard Deviation 3.2

PRIMARY outcome

Timeframe: Baseline and 24 months

Change in photopic visual fields between baseline and 24 months

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=10 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Photopic Visual Field
Foveal Sensitivity
-0.8 dB
Standard Deviation 12.2
-0.8 dB
Standard Deviation 1.3
Change in Photopic Visual Field
Mean Sensitivity
-0.74 dB
Standard Deviation 1.90
-1.0 dB
Standard Deviation 2.4

PRIMARY outcome

Timeframe: 24 months

Change in Frequency Doubling Perimetry (FDP) from baseline, shown as mean and foveal (center of retina) scores

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=10 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Frequency Doubling Perimetry (FDP)
Foveal Sensitivity
-1.9 dB
Standard Deviation 3.8
1.8 dB
Standard Deviation 3.6
Change in Frequency Doubling Perimetry (FDP)
Mean FDP sensitivity
-0.7 dB
Standard Deviation 3.9
0.7 dB
Standard Deviation 2.7

PRIMARY outcome

Timeframe: Baseline and 24 months

Change in ETDRS visual acuity letter score from baseline. ETDRS is measured on a scale of 0 to 70 where 0 means inability to see anything on the chart and 70 is normal (20/20) acuity.

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=11 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Early Treatment Diabetic Retinopathy Study (ETDRS)
0.3 score on a scale
Standard Deviation 8.8
0.2 score on a scale
Standard Deviation 4.9

SECONDARY outcome

Timeframe: Baseline and 24 months

Change in central subfield thickness from baseline

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=11 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Central Subfield Thickness
-1.5 μm
Standard Deviation 14.9
4.8 μm
Standard Deviation 26.3

SECONDARY outcome

Timeframe: 24 months

Change in macular volume from baseline

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=11 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Macular Volume
-0.2 mm^3
Standard Deviation 0.3
-0.1 mm^3
Standard Deviation 0.7

SECONDARY outcome

Timeframe: 24 months

Change in Central Retinal Artery Equivalent (CRAE) diameter from baseline

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=11 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Central Retinal Artery Equivalent (CRAE) Diameter
-0.49 μm
Standard Deviation 12
0.17 μm
Standard Deviation 14

SECONDARY outcome

Timeframe: 24 months

Change in Central Retinal Vein Equivalent (CRVE) diameter from baseline

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=11 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Central Retinal Vein Equivalent (CRVE) Diameter
-6.3 μm
Standard Deviation 19
-6.6 μm
Standard Deviation 18

SECONDARY outcome

Timeframe: 24 months

Change in arteriovenous ratio diameter from baseline

Outcome measures

Outcome measures
Measure
Placebo
n=15 Participants
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=11 Participants
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Change in Arteriovenous Ratio Diameter
0.013 ratio
Standard Deviation 0.057
0.013 ratio
Standard Deviation 0.056

Adverse Events

Placebo

Serious events: 3 serious events
Other events: 14 other events
Deaths: 0 deaths

Doxycycline Monohydrate

Serious events: 3 serious events
Other events: 15 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Placebo
n=15 participants at risk
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=15 participants at risk
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Injury, poisoning and procedural complications
motor vehicle accident
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Blood and lymphatic system disorders
elevated serum creatinine level
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
persistent vitreous hemorrhage
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Respiratory, thoracic and mediastinal disorders
pulmonary embolism
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Nervous system disorders
concussion of brain
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Gastrointestinal disorders
umbilical hernia
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Gastrointestinal disorders
vomiting
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Injury, poisoning and procedural complications
skull fracture
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months

Other adverse events

Other adverse events
Measure
Placebo
n=15 participants at risk
stratified equally to placebo taken once daily for 24 months placebo: placebo taken once daily for 24 months
Doxycycline Monohydrate
n=15 participants at risk
stratified equally to doxycycline monohydrate 50mg taken once daily for 24 months doxycycline monohydrate: 50mg once daily for 24 months
Musculoskeletal and connective tissue disorders
abscess molar tooth (root canal)
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Immune system disorders
allergic reaction - reason unknown
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Immune system disorders
allergies (seasonal)
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Musculoskeletal and connective tissue disorders
ankle sprain (right)
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Psychiatric disorders
anxiety (mild)
6.7%
1/15 • 24 months
6.7%
1/15 • 24 months
Musculoskeletal and connective tissue disorders
back pain (possibly with neck pain)
13.3%
2/15 • 24 months
13.3%
2/15 • 24 months
Renal and urinary disorders
benign prostatic hyperplasia
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Skin and subcutaneous tissue disorders
bilateral blepharitis
20.0%
3/15 • 24 months
0.00%
0/15 • 24 months
Injury, poisoning and procedural complications
broken right foot
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Respiratory, thoracic and mediastinal disorders
bronchitis
13.3%
2/15 • 24 months
0.00%
0/15 • 24 months
Nervous system disorders
burning sensation in fingers
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Surgical and medical procedures
carpal tunnel surgery (left)
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
cataract
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Surgical and medical procedures
cataract extraction
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
chalazion left eye
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Respiratory, thoracic and mediastinal disorders
chest cold
0.00%
0/15 • 24 months
13.3%
2/15 • 24 months
Cardiac disorders
congestive heart failure
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Gastrointestinal disorders
constipation
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Respiratory, thoracic and mediastinal disorders
cough
20.0%
3/15 • 24 months
6.7%
1/15 • 24 months
Nervous system disorders
decreased smell
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Nervous system disorders
decreased taste
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Psychiatric disorders
depression
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Gastrointestinal disorders
diarrhea
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
diplopia
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Skin and subcutaneous tissue disorders
dry rash
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Skin and subcutaneous tissue disorders
epidermoid cyst
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
epiretinal fibrosis
6.7%
1/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
epiretinal membrane, (slight) right eye
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Injury, poisoning and procedural complications
fall (cause of injuries unknown)
0.00%
0/15 • 24 months
13.3%
2/15 • 24 months
General disorders
fatigue
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
flashes right eye
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
floaters left eye
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Infections and infestations
flu
26.7%
4/15 • 24 months
6.7%
1/15 • 24 months
Musculoskeletal and connective tissue disorders
fluid on left knee
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Gastrointestinal disorders
gastric ulcer
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Metabolism and nutrition disorders
gout
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Respiratory, thoracic and mediastinal disorders
head cold
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Nervous system disorders
headaches
6.7%
1/15 • 24 months
13.3%
2/15 • 24 months
Renal and urinary disorders
high creatinine
13.3%
2/15 • 24 months
13.3%
2/15 • 24 months
Eye disorders
high intraocular pressure
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Renal and urinary disorders
high urine albumin
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Metabolism and nutrition disorders
hyperlipidemia
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Cardiac disorders
hypertension
26.7%
4/15 • 24 months
6.7%
1/15 • 24 months
Metabolism and nutrition disorders
hypoglycemic episode
20.0%
3/15 • 24 months
0.00%
0/15 • 24 months
Musculoskeletal and connective tissue disorders
impacted wisdom tooth
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
increased glare
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Infections and infestations
infection
13.3%
2/15 • 24 months
0.00%
0/15 • 24 months
Renal and urinary disorders
cystitis
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Surgical and medical procedures
left distal tibia/fibula fracture and surgery
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Musculoskeletal and connective tissue disorders
leg pain (both)
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Blood and lymphatic system disorders
leukocytosis
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Blood and lymphatic system disorders
low potassium
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Gastrointestinal disorders
nausea
6.7%
1/15 • 24 months
6.7%
1/15 • 24 months
Musculoskeletal and connective tissue disorders
neck stiffness
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
peripheral retinopathy (PDR)
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
neovascularization
33.3%
5/15 • 24 months
20.0%
3/15 • 24 months
Musculoskeletal and connective tissue disorders
nocturnal leg cramps
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
ocular hypertension right eye
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Surgical and medical procedures
oral surgery
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Musculoskeletal and connective tissue disorders
pain in right shoulder
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
purulent conjunctivitis
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Respiratory, thoracic and mediastinal disorders
pneumonia
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Injury, poisoning and procedural complications
post-traumatic right shoulder adhesive capsulitis
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
pre-retinal hemorrhage
6.7%
1/15 • 24 months
13.3%
2/15 • 24 months
Renal and urinary disorders
prostatitis
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Immune system disorders
pruritus during fluorescein angiography
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
punctate keratopathy
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Product Issues
received dentures
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Musculoskeletal and connective tissue disorders
right ankle pain
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Musculoskeletal and connective tissue disorders
right ankle sprain
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Musculoskeletal and connective tissue disorders
right foot pain
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Injury, poisoning and procedural complications
right shoulder fracture
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
shallow traction retinal detachment
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Respiratory, thoracic and mediastinal disorders
sinus infection
20.0%
3/15 • 24 months
6.7%
1/15 • 24 months
Respiratory, thoracic and mediastinal disorders
sleep apnea
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Infections and infestations
sore throat
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Infections and infestations
stomach virus
0.00%
0/15 • 24 months
13.3%
2/15 • 24 months
Surgical and medical procedures
tendon release surgery (right hand)
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Surgical and medical procedures
tendon release surgery (thumb)
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Surgical and medical procedures
tooth extraction
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Surgical and medical procedures
upper and lower teeth extracted
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Respiratory, thoracic and mediastinal disorders
upper respiratory infection
6.7%
1/15 • 24 months
6.7%
1/15 • 24 months
Renal and urinary disorders
urinary retention
0.00%
0/15 • 24 months
6.7%
1/15 • 24 months
Renal and urinary disorders
urinary tract infection
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Nervous system disorders
vertigo
6.7%
1/15 • 24 months
0.00%
0/15 • 24 months
Eye disorders
vitrectromy
13.3%
2/15 • 24 months
6.7%
1/15 • 24 months
Eye disorders
vitreous hemorrhage
13.3%
2/15 • 24 months
13.3%
2/15 • 24 months

Additional Information

Dr. Thomas W. Gardner

University of Michigan

Phone: 734 232-8404

Results disclosure agreements

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