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. Author manuscript; available in PMC: 2005 Oct 17.
Published in final edited form as: Ophthalmology. 2004 Nov;111(11):1993–2006. doi: 10.1016/j.ophtha.2004.07.023

Table 3.

Number (%) of Patients Examined at Each Scheduled Examination Time in the SST Group B Trial

By Treatment Arm
 By Baseline VA Stratum
Observation
 Surgery
 VA> 20/200
 VA≤ 20/200
Months SinceEnrollment No. Expected* No. (%) Examined No. Expected* No. (%) Examined No. Expected* No. (%) Examined No Expected* No. (% ) Examined
0 168 168 (100) 168 168 (100) 129 129 (100) 207 207 (100)
1 — — 168 162 (96) 61 60 (98) 107 102 (95)
3 168 151 (90) 167 163 (98) 129 125 (97) 206 189 (92)
6 165 147 (89) 167 154 (92) 128 123 (96) 204 178 (87)
12 160 139 (87) 163 152 (93) 125 118 (94) 198 173 (87)
24 154 140 (91) 159 151 (95) 122 116 (95) 191 175 (92)
36 100 87 (87) 98 86 (88) 75 67 (89) 123 106 (86)
48 45 39 (87) 36 30 (83) 29 24 (83) 52 45 (87)

VA = visual acuity.

*

Based on date of enrollment, vital status, and data analysis date.