AACS 2003.
Methods | Method of randomization: Not clearly described - “randomization schedule generated by the biostatistics department of Alcon Research”. Method of allocation concealment: Study medication and supplies for posterior juxtascleral administration were placed in sealed, opaque, sequentially numbered boxes identified by participant number only. Masking of participants and care-givers: Adequate. Masking of outcome assessment: Adequate. Losses to follow-up: At 6 months, 6.25%, 24.2%, 3% and 13.3% participants were lost to follow-up in the 3 mg, 15 mg, 30 mg Anecortave acetate and placebo groups respectively. At 1 year, however, 37.5%, 48.5%, 36.4% and 40% participants were not analysed in the 3 mg, 15 mg, 30 mg Anecortave acetate and placebo groups respectively. Intention-to-treat analysis: The 6 month analysis was by intention-to-treat with the last observation carried forward to impute missing values. However, the 12 month analysis was not. Reported sample size calculation: Assuming a standard deviation of 0.285 logMAR lines in visual acuity, the study reported a 80% power to detect a difference between treatment means of approximately 2 logMAR lines in a 2-tailed t-test with a 0.05 level of significance with 30 patients per group Unusual study design: The patients were examined by a masked ophthalmologist at 6 months who determined whether the patient was likely to benefit with further treatment. Patients judged as unlikely to benefit from further treatment were excluded from further follow-up. |
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Participants | # randomized in treatment arm: 3 mg (n = 32), 15 mg (n =33), and 30 mg (n=33) # randomized in control arm: n=30 Inclusion criteria:
Exclusion criteria:
Age: Mean age was 78.1, 75.8, 75.7 and 78.3 years in 3 mg, 15 mg, 30 mg Anecortave acetate and placebo groups, respectively. Gender: 46.9%, 54.5%, 54.5% and 60% were females in 3 mg, 15 mg, 30 mg Anecortave acetate and placebo groups, respectively Equivalence of baseline characteristics: All groups were similar at baseline with respect to age, race, composition of lesions, logMAR visual acuity, sizes of choroidal neovascularization and classic component of the lesions. |
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Interventions | Treatment: Juxtascleral depot injection of three doses of acetonide anecortave acetate: 30 mg, 15 mg, and 3 mg. At each month 6 visit, a masked ophthalmologist decided if the patient might benefit from retreatment. Retreatment was performed by an unmasked ophthalmologist using the assigned treatment as originally randomized. Control: Placebo injection in the same fashion. |
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Outcomes | Primary outcome: Mean change in logMAR visual acuity from baseline. Secondary outcomes: Percentage of all participants exhibiting stabilized vision (< 3 lines lost). Percentage of participants with clinically significant worsening of vision defined as loss of at least 3 lines vision. Percentage of participants with severe vision loss (at least 6 logMAR lines lost). Percentage of participants that demonstrated reduced lesion growth (percent change from baseline). |
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Notes | Country: 18 centers across United States and Europe. Time period of study: April 1999 to May 2001. |
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Risk of bias | ||
Item | Authors' judgement | Description |
Allocation concealment? | Yes | A-Adequate |