Table 1.
Demographic and clinical data for patients with different axial lengthsa
| AL (mm) | < 24.5 | 24.5~26 | 26~28 | 28~30 | > 30 | P valueb | Correlation with ALc |
|---|---|---|---|---|---|---|---|
| 21.40–24.49 | 24.51–25.90 | 26.02–27.97 | 28.12–29.92 | 30.08–37.96 | |||
| Subjects (n) | 131 | 25 | 52 | 29 | 42 | / | / |
| Right/left eye | 68/63 | 14/11 | 21/31 | 15/14 | 25/17 | 0.425 | / |
| ACD (mm) |
2.34 ± 0.46 (1.16–3.39) |
2.73 ± 0.31 (2.10–3.30) |
2.93 ± 0.35 (2.07–4.38) |
< 0.001d |
r = 0.521 P < 0.001d |
||
| CCT (mm) |
0.54 ± 0.03 (0.45–0.64) |
0.56 ± 0.04 (0.51–0.70) |
0.55 ± 0.04 (0.46–0.64) |
0.027d |
r = 0.094 P = 0.116 |
||
| LT (mm) |
4.51 ± 0.54 (3.25–5.81) |
4.38 ± 0.49 (3.27–5.36) |
4.34 ± 0.42 (3.28–5.79) |
0.023d |
r = − 0.116 P = 0.053 |
||
| Flat K (D) |
43.01 ± 1.54 (40.16–47.62) |
42.02 ± 1.44 (39.09–44.61) |
42.03 ± 1.50 (36.29–45.32) |
< 0.001d |
r = − 0.333 P < 0.001d |
||
| Steep K (D) |
44.00 ± 1.61 (40.99–48.43) |
43.02 ± 1.65 (39.33–45.56) |
43.23 ± 1.71 (36.89–46.88) |
< 0.001d |
r = − 0.241 P < 0.001d |
||
| Average K (D) |
43.51 ± 1.53 (40.61–48.04) |
42.52 ± 1.52 (39.25–44.99) |
42.63 ± 1.56 (36.59–45.54) |
< 0.001d |
r = − 0.293 P < 0.001d |
||
AL = axial length; ACD = anterior chamber depth (from the corneal endothelium to the anterior lens capsule); CCT = central corneal thickness; LT = lens thickness; K = (conventional) keratometry
a Data are presented as mean ± standard deviation; range is listed below in brackets
b Differences among three groups [groups E (AL < 24.5 mm), M (AL 24.5–26 mm), and H (AL > 26 mm)] were analyzed with one-way ANOVA, and a χ2 test was used to compare categorical data
c Correlations between selected variables and AL were analyzed with Pearson’s correlation test
d Statistically significant (P < 0.05)