Table 5.
Frequency distribution of time from image submission to image grading completion by grading perioda
| Time intervals, hours | From image submission to image
grading completion |
From image acquisition to image
grading completion |
||||
|---|---|---|---|---|---|---|
| Before or on October 30, 2014 (n = 357
sessions) |
After October 30, 2014 (n = 466
sessions) |
P value | Before or on October 30, 2014 (n = 357 sessions) | After October 30, 2014 (n = 466 sessions) | P value | |
| No. sessions (%) | No. sessions (%) | |||||
| ≤1 | 63 (17.7) | 173 (37.1) | <0.0001 | 0 (0) | 4 (0.9) | <0.0001 |
| >1, ≤4 | 37 (10.4) | 94 (20.2) | 46 (12.9) | 112 (24.0) | ||
| >4, ≤8 | 9 (2.5) | 9 (1.9) | 44 (12.3) | 64 (13.7) | ||
| >8, ≤16 | 98 (27.5) | 136 (29.2) | 9 (2.5) | 19 (4.1) | ||
| >16, ≤24 | 119 (33.3) | 48 (10.3) | 156 (43.7) | 142 (30.5) | ||
| >24, ≤32 | 18 (5.0) | 2 (0.4) | 64 (17.9) | 32 (6.9) | ||
| >32, ≤40 | 7 (2.0) | 2 (0.4) | 3 (0.8) | 2 (0.4) | ||
| >40, ≤48 | 5 (1.4) | 1 (0.2) | 20 (5.6) | 27 (5.8) | ||
| ≥48 | 1 (0.3) | 1 (0.2) | 15 (4.2) | 64 (13.7) | ||
| Median (Q1, Q3) | 15.2 (2.9, 19.4) | 1.8 (0.6, 14.1) | <0.0001 | 20.2 (7.6, 24.4) | 17.7 (4.1, 26.1) | 0.003 |
| Minimum, maximum | 0, 65.6 | 0.1, 189 | 1.2, 620 | 0.9, 216 | ||
| Adjudicated (%) | 59 (16.5) | 76 (16.3) | 1.00 | |||
a
After October 30, 2014, the reading center implemented more systematic grading approach that required trained readers check the queue at least 3 times daily and complete all available gradings by the end of the day.