Table 2 Characteristics of the training and validation sets.
From: Nomogram for predicting secondary surgery in patients with concomitant exotropia
Variables | Total (n = 355) | Validation set (n = 107) | Training set (n = 248) | Statistic | P-value |
|---|---|---|---|---|---|
Sex, n(%) | χ²=0.40 | 0.525 | |||
Male | 175 (49.30) | 50 (46.73) | 125 (50.40) | ||
Female | 180 (50.70) | 57 (53.27) | 123 (49.60) | ||
Age at Surgery (years) | 6.87 ± 3.39 | 6.66 ± 2.96 | 6.96 ± 3.56 | t=−0.76 | 0.445 |
Age of Onset (years) | 3.08 ± 2.27 | 2.86 ± 2.24 | 3.17 ± 2.27 | t=−1.20 | 0.233 |
Refraction, n(%) | χ²=0.06 | 0.970 | |||
≥0.0D | 264 (74.37) | 79 (73.83) | 185 (74.60) | ||
−3.0D-0.0D | 77 (21.69) | 24 (22.43) | 53 (21.37) | ||
<−3.0D | 14 (3.94) | 4 (3.74) | 10 (4.03) | ||
Amblyopia, n(%) | χ²=0.03 | 0.874 | |||
No | 307 (86.48) | 93 (86.92) | 214 (86.29) | ||
Yes | 48 (13.52) | 14 (13.08) | 34 (13.71) | ||
Etiology, n(%) | χ²=5.01 | 0.073 | |||
Congenital | 79 (22.25) | 32 (29.91) | 47 (18.95) | ||
Acquired | 276 (77.75) | 75 (70.09) | 201 (81.05) | ||
Accompanying Sign | χ²=0.01 | 0.928 | |||
No | 231 (65.07) | 70 (65.42) | 161 (64.92) | ||
Yes | 124 (34.93) | 37 (34.58) | 87 (35.08) | ||
Deviation Angles (PD) | −35.10 ± 17.67 | −35.92 ± 17.43 | −34.75 ± 17.79 | t=−0.57 | 0.568 |
Type, n(%) | χ²=2.27 | 0.322 | |||
Basic | 193 (54.37) | 64 (59.81) | 129 (52.02) | ||
Convergence insufficiency | 138 (38.87) | 38 (35.51) | 100 (40.32) | ||
Divergence excess | 24 (6.76) | 5 (4.67) | 19 (7.66) | ||
Surgery Amount (mm) | 12.42 ± 3.70 | 11.93 ± 3.90 | 12.63 ± 3.59 | t=−1.64 | 0.102 |
Deviation Angles 1w | - | 0.799 | |||
−5 ~ 5PD | 309 (87.04) | 91 (85.05) | 218 (87.90) | ||
−6~−10PD | 32 (9.01) | 12 (11.21) | 20 (8.06) | ||
>−10PD | 8 (2.25) | 3 (2.80) | 5 (2.02) | ||
6 ~ 10PD | 1 (0.28) | 0 (0.00) | 1 (0.40) | ||
> 10PD | 5 (1.41) | 1 (0.93) | 4 (1.61) |
