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Table 2 Characteristics of patients with postoperative exo-drift > 20 PD and ≤ 20 PD.

From: Risk factors for excessive postoperative exo-drift after unilateral lateral rectus muscle recession and medial rectus muscle resection for intermittent exotropia

Parameter

Group A (n = 36)

Group B (n = 28)

P value

Age at surgery

8.4 ± 2.8

10.8 ± 3.8

0.007 *

Preoperative angle of deviation at distance

−18.3 ± 3.8°

−16.4 ± 3.2°

0.033 *

Preoperative near-distance disparity in deviation

1.5 ± 3.4°

3.1 ± 3.1°

0.088

Refractive error in the operative eye

−0.8 ± 1.5

−1.3 ± 2.8

0.091

Difference between refractive error of both eyes

0.4 ± 0.5

0.7 ± 1.1

0.113

Difference between visual acuity of both eyes

0.027 ± 0.041

0.045 ± 0.060

0.257

Stereoacuity values transformed to log arcsec

2.1 ± 0.6

2.0 ± 0.6

0.799

Peripheral fusion at distance

22 ± 42%

50 ± 51%

0.021 *

Peripheral fusion at near

78 ± 42%

71 ± 46%

0.564

Initial postoperative angle of deviation at distance

9.3 ± 5.1°

4.7 ± 4.0°

0.001 *

Initial postoperative near-distance disparity in deviation

2.1 ± 4.5°

1.4 ± 4.1°

0.357

Last postoperative angle of deviation at distance

−6.3 ± 5.5°

−3.4 ± 3.5°

0.017 *

Postoperative elapsed time to the last examination

660 ± 199 days

636 ± 193 days

0.756

  1. All data are presented as mean ± standard deviation
  2. * represents statistical significance (P < 0.05)