Table 6.

Nine-month structural outcome for randomized patients^*

Eyes treated	Eyes treated at high-risk prethreshold	Conventionally managed eyes	χ2	P value
Bilateral	290† (10.3)	291† (17.2)	11.7‡	<.001
Asymmetric	42§ (0)	36 (2.8)	1.2	.28
Total	332 (9.0)	327 (15.6)	12.6	<.001¶

^*Data are presented as number (percentage unfavorable) unless otherwise indicated.

^†Less than 293 because of inability to determine the structural outcome.

^‡Based on discordant pairs (25 infants with favorable outcomes in earlier treated eyes and unfavorable outcomes in conventionally managed eyes; 6 infants with unfavorable outcomes in earlier treated eyes and favorable outcomes in conventionally managed eyes).

^§Less than 43 because of inability to determine the structural outcome.

^¶Twenty-four eyes with partial retinal detachment not including the macula (stage 4A) had vitrectomy or a scleral buckling procedure prior to the 9-month examination and are included in this Table as having an unfavorable outcome. When the analysis was based on the structural outcome of these examinations, P = .002. Stage 4B or 5 eyes were a priori considered unfavorable in this study.