Table 2.
Corneal thickness values for Chinese subjects with healthy eyes stratified into different age groups
| Age groups | N (missing) | Mean ± SD | M (Q1–Q3) | χ2 | P |
|---|---|---|---|---|---|
| Central corneal thickness | |||||
| < 18 years* | 780 (1) | 544.73 ± 30.33 | 544.00 (522.00–563.00) | 40.5549 | < 0.0001 |
| 18–30 years* | 21,495 (9) | 543.78 ± 29.40 | 543.00 (524.00–563.00) | ||
| 31–40 years△ | 6945 (0) | 541.54 ± 28.63 | 541.00 (522.00–560.00) | ||
| 41–50 years△ | 1398 (0) | 540.54 ± 29.07 | 540.00 (520.00–561.00) | ||
| Minimum corneal thickness | |||||
| < 18 years* | 780 (1) | 541.53 ± 30.18 | 540.00 (519.00–560.00) | 41.7169 | < 0.0001 |
| 18–30 years* | 21,495 (9) | 540.76 ± 29.24 | 540.00 (521.00–560.00) | ||
| 31–40 years△ | 6945 (0) | 538.58 ± 28.52 | 538.00 (519.00–557.00) | ||
| 41–50 years△ | 1398 (0) | 537.24 ± 28.74 | 536.50 (516.00–557.00) | ||
Wilcoxon rank sum test
Different symbols (△, *) indicate significant differences between groups
SD standard deviation, M median