Mean ages and times of developmental assessments for the three groups
| Surgical SS group | Normal control group | Non-surgical SS control group | |
|---|---|---|---|
| Preoperative developmental assessment/occasion 1 | n = 28 (5 girls, 23 boys) | n = 28 (5 girls, 23 boys) | n = 13 (2 girls, 11 boys) |
| Mean age: 6.9 months (SD 5.71; range 2.4–30.2) | Mean age: 7.2 months (SD 6.14; range 1.7–33.7) | Mean age: 25.7 months (SD19.98; range 5.3–76.6) | |
| Mean interval: 1.1 months before surgery (SD 1.77; range 0.03–9.5) | |||
| 1st postoperative developmental assessment/occasion 2 | n = 28 | n = 13 | |
| Mean age: 15.2 months (SD 7.93; range 5.7–45.9) | Mean age: 34.8 months (SD 19.31; range 15.8–84.5) | ||
| Mean interval: 7.2 months after surgery (SD 2.70; range:2.9–15.6) | |||
| 2nd postoperative developmental assessment | n = 11 | ||
| Mean age: 46.5 months (SD 22.06; range 10.9–69.5) | |||
| Mean interval: 41.0 months after surgery (SD 21.84; range 8.1–66.5) | |||
| 3rd postoperative developmental assessment | n = 4 | ||
| Mean age: 49.9 months (SD 19.28; range 23.3–66.0) | |||
| Mean interval: 45.3 months after surgery (SD 18.36; range 20.5–62.0) | |||
| 4th postoperative developmental assessment | n = 1 | ||
| Age: 60.1 months | |||
| Interval: 54.5 months after surgery |