Variables | All infants | Comparison between Group 1 and 2 | ||
---|---|---|---|---|
Group 1 | Group 2 | p value | ||
(Primary IVR) | (Primary laser) | |||
Patients, n | 14 | 9 | 5 | / |
Male, n (%) | 8 | 7 (78%) | 0 (0%) | 0.021* (Fisher’s exact test) |
GA, weeks (mean ± SD) | 28.9 ± 2.3 | 29.0 ± 2.2 | 28.8 ± 2.6 | 0.882 (Student t-test) |
(range) | (26.0–33.0) | (27.0–33.0) | (26.0–32.0) | |
BW, grams (mean ± SD) | 1227.1 ± 347.9 | 1200.5 ± 360.3 | 1275.0 ± 359.6 | 0.717 (Student t-test) |
(range) | (815–2000) | (815–2000) | (980–1800) | |
PMA at diagnosis, weeks [mean ± SD (range)] | 41.4 ± 2.2 | 40.8 ± 1.0 (40–43) | 42.6 ± 3.4 (40–48) | 0.518 (Mann-Whitney test) |
Follow-up, months [mean ± SD (range)] | 12.5 ± 6.9 (6–24) | 11.0 ± 5.9 (6–24) | 15.2 ± 8.3 (6–24) | 0.290 (Student t-test) |
Eyes, n | 27 | 17 | 10 | |
Zone 2 stage 3 with plus, n (%) | 20 | 14 (82%) | 6 (60%) | 0.365 (Pearson’s Chi-squared test) |
Zone 2 stage 2 with plus, n (%) | 7 | 3 (18%) | 4 (40%) | / |
Posterior zone 2 disease | 12 (86%) | 0 (0) | < 0.001(Fisher’s exact test) | |
Fibrotic ridges, n (%) | 17 | 12 (70%) | 5 (50%) | 0.415 |
Hemorrhage on fibrovascular ridge, n, (%) | 11 | 10 (59%) | 1 (10%) | 0.018* (Fisher’s exact test) |