Results of maximum intraocular pressure and the transformed maximum cup/disc ratio for mean, range, and standard error of the mean (SEM) according to birth weight
| Birth weight (lb) | Number | Mean | Range | SD | SEM |
|---|---|---|---|---|---|
| Maximum intraocular pressure: | |||||
| ⩽5.5 | 22 | 17.1 | 12–20 | 1.86 | 0.40 |
| 5.5 <−6.5 | 108 | 17.9 | 12–25 | 2.59 | 0.25 |
| 6.5 < −7.5 | 238 | 17.9 | 12–34 | 3.07 | 0.20 |
| 7.5 < −8.5 | 225 | 18.1 | 12–28 | 2.86 | 0.19 |
| 8.5 < −9.5 | 90 | 17.9 | 12–28 | 2.87 | 0.30 |
| >9.5 | 36 | 17.4 | 12–29 | 3.12 | 0.52 |
| Transformed maximum cup/disc ratio: | |||||
| ⩽5.5 | 22 | 0.41 | 0.0–0.71 | 0.19 | 0.04 |
| 5.5 <−6.5 | 108 | 0.44 | 0.0–1.0 | 0.15 | 0.01 |
| 6.5 < −7.5 | 238 | 0.46 | 0.0–1.0 | 0.17 | 0.01 |
| 7.5 < −8.5 | 225 | 0.46 | 0.0–0.89 | 0.16 | 0.01 |
| 8.5 < −9.5 | 90 | 0.44 | 0.0–0.84 | 0.15 | 0.02 |
| >9.5 | 36 | 0.46 | 0.32–0.77 | 0.12 | 0.02 |
↵1lb = 454 g.