Table 3.
Preoperative descriptive data (subjective refraction).
| Parameter | Age 20–45 y.o. (N = 106) |
Age 45–54 y.o. (N = 34) |
Total (N = 140) | p-value |
|---|---|---|---|---|
| Sphere (D) | W = 1905.5, p = 0.613, r=− 0.043a | |||
| Range | 2.00, 4.00 | 2.00, 4.00 | 2.00, 4.00 | |
| Mean (SD) | 2.93 (0.55) | 2.87 (0.51) | 2.92 (0.54) | |
| Median (Q1,Q3) | 3.00 (2.50, 3.25) | 3.00 (2.50, 3.25) | 3.00 (2.50, 3.25) | |
| Cylinder (D) | W = 1683, p = 0.542, r=− 0.052a | |||
| Range | − 1.00, − 0.25 | − 1.00, 0.00 | − 1.00, 0.00 | |
| Mean (SD) | − 0.53 (0.23) | − 0.51 (0.29) | − 0.53 (0.24) | |
| Median (Q1,Q3) | − 0.50 (− 0.75, − 0.31) | − 0.50 (− 0.75, − 0.25) | − 0.50 (− 0.75, − 0.25) | |
| Spherical Equivalent (D) | p = 0.434, r = 0.100b | |||
| Range | 2.12, 4.38 | 2.12, 4.00 | 2.12, 4.38 | |
| Mean (SD) | 3.20 (0.56) | 3.12 (0.49) | 3.18 (0.54) | |
| Median (Q1,Q3) | 3.25 (2.75, 3.62) | 3.19 (2.88, 3.44) | 3.25 (2.75, 3.62) | |
y.o.: years old, D: diopter, SD: standard deviation, Q1: first quartile, Q3: third quartile.
aMann-Whitney test.
bIndependent t-test.