Near angle | Distance angle | Near Frisby stereo* | Total NCS | VA worse eye | |
---|---|---|---|---|---|
Median (IQR); (range) n=58† | Median (IQR); (range) n=60† | Median (IQR); (range) n=32 | Median (IQR); (range) n=57‡ | Mean (SD); (range) n=62 | |
Pre-operative assessment | 20 (14–30); (0–50) | 30 (25–40); (16–50) | 1.93 (1.74–2.23); (1.74–2.90) | 6 (4–7.5); (2–9) | 0.122 (0.107); (–0.050–0.500) |
Last post-operative assessment | 8 (2–12); (−8–40) | 12 (2–18); (−3–35) | 1.88 (1.74–2.01); (1.30–2.90) | 1 (0–3); (0–9) | 0.148 (0.137); (−0.025–0.540) |
Difference | Median diff | Median diff | Median diff | Median diff | Mean diff |
−12 | −18 | −0.05 | −5 | 0.026 | |
Significance§ | Z=−5.6 | Z=−6.6 | Z=−2.07 | Z=−6.3 | 95% CI |
p<0.001 | p<0.001 | p=0.04 | p<0.001 | −0.004, 0.056 | |
p=0.09 |
*Log transformed; excludes those aged under 4 years of age at the time of pre-op assessment.
†Analysis of improvement in angle excludes the 11 patients who had an esotropia postoperatively, that is, were over-corrected; in addition, information about changes in angle measurements was not available for three children at near, and one at distance, due to poor cooperation. Minus values within the post-operative range of angle measurements represent those who were esophoric postoperatively.
‡(a) Total NCS missing for four patients because the home control component was missing at either pre- or post-operative assessment; (b) NCS not applicable to the 11 over-corrected patients
§Of difference between pre-operative and last post-operative assessment. Change in median tested using Wilcoxon, change in mean measured using paired t-test.
NCS, Newcastle Control Score. VA, visual acuity.