Table 2.
Children Not Testable on NCR, Retinomax, and SureSight, Overall and by Age
| Screening Test | Not Testable*/Total Screenings, n (%) |
P (Comparison between Age Groups) | |||
|---|---|---|---|---|---|
| All Ages Combined | 3-Year-Olds | 4-Year-Olds | 5-Year-Olds | ||
| NCR | 9/1142 (0.79) | 1/215 (0.47) | 6/608 (0.99) | 2/319 (0.63) | 0.82 |
| Retinomax† | 19/5476 (0.35) | 7/1258 (0.56) | 8/2950 (0.27) | 4/1268 (0.32) | 0.48 |
| SureSight† | 55/4341 (1.27) | 18/1043 (1.73) | 23/2344 (0.98) | 14/954 (1.46) | 0.24 |
| P for comparison between two screening tests | |||||
| NCR vs. Retinomax | 0.11 | 0.86 | 0.09 | 0.51 | |
| NCR vs. SureSight | 0.14 | 0.046 | 0.99 | 0.18 | |
| SureSight vs. Retinomax | <0.0001 | 0.003 | 0.003 | 0.01 | |
*
Not testable was defined as no measurements were obtained in one or both eyes after 3 attempts per eye.
†
Nurse and lay screeners administered test to the same children in the VIP phase I; thus, screened children were counted twice in calculating the percentage of those not testable.