Table 3.
The frequency distribution of time from image submission to image grading completion by RW-ROPa status from image grading
| Time intervals, hours | Time from image submission to
image grading completion |
P value | ||
|---|---|---|---|---|
| RW-ROP absent in an image session (n = 500
sessions) |
RW-ROP present in an image session (n = 290
sessions) |
RW-ROP indeterminate in an image session (n
= 33 sessions) |
||
| No. of sessions (%) | No. of sessions (%) | No. of sessions (%) | ||
| ≤1 | 147 (29.4) | 80 (27.6) | 9 (27.3) | 0.048 |
| >1, ≤4 | 89 (17.8) | 34 (11.7) | 8 (24.2) | |
| >4, ≤8 | 11 (2.2) | 7 (2.41) | 0 (0) | |
| >8, ≤16 | 123 (24.6) | 104 (35.9) | 7 (21.1) | |
| >16, ≤24 | 111 (22.2) | 50 (17.2) | 6 (18.2) | |
| >24, ≤32 | 11 (2.2) | 7 (2.4) | 2 (6.1) | |
| >32, ≤40 | 6 (1.2) | 3 (1.0) | 0 (0) | |
| >40, ≤48 | 1 (0.2) | 4 (1.4) | 1 (3.0) | |
| ≥48 | 1 (0.2) | 1 (0.3) | 0 (0) | |
| Median (Q1, Q3) | 9.75 (0.8, 16.2) | 12.7 (0.9, 15.7) | 3.5 (1.0, 17.4) | 0.88 |
| Minimum, maximum | 0, 189 | 0.1, 65.6 | 0.20, 46.8 | |
| Adjudicated (%) | 61 (12.2%) | 62 (21.4%) | 12 (36.4%) | <0.0001 |
RW-ROP, referral-warranted ROP; ROP, retinopathy of prematurity.
a
RW-ROP is any zone I ROP, stage 3 or worse ROP, or plus disease.