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Difference in mean visual acuity between babies with and without retinopathy of prematurity
| ROP | n | Mean in logMAR units | SD | SEM | t |
|---|---|---|---|---|---|
| Present | 197 | 0.2822 | 0.06654 | 0.00474 | 2.336 |
| Absent | 595 | 0.2714 | 0.05245 | 0.00215 |
SEM: Standard error mean, logMAR: Logarithm of the minimum angle of resolution, SD: Standard deviation, ROP: Retinopathy of prematurity
