Variable | Operative (n = 14) | Nonoperative (n = 13) | P |
Initial Cobb angle (°) | −5° ± 20.5° (−43.5 to 33) | −13° ± 13.4° (−31.8 to 14.1) | 0.225a |
First follow-up | |||
Days at first follow-up | 40.7 ± 21.9 (17–97) | 39.7 ± 16 (16–64) | 0.892 |
Cobb angle at first follow-up (°) | 2.6° ± 17° (−15.1 to 42) | −13.9° ± 15° (−34 to 16.8) | 0.015 a |
Change in Cobb angle from presentation (°) | 7.6° ± 10.9° (−8.3 to 34.8) | −0.9° ± 5.1° (−13.7 to 6.1) | 0.029a |
Second follow-up | |||
Patients lost prior to second follow-up | 3 (21%) | 5 (38.5%) | 0.42 |
Days at second follow-up | 148.3 ± 126.6 (45–430) | 86.6 ± 49.9 (40–166) | 0.212 |
Cobb angle at second follow-up (°) | 3.6° ± 18.4° (−16 to 43) | −12° ± 15.8° (−32.4 to 16.3) | 0.07a |
Change in Cobb angle from presentation (°) | 4.1° ± 8.9° (−14.6 to 12.4) | −1.4° ± 3.1° (−5.1 to 2.8) | 0.117a |
Change in Cobb angle from first follow-up (°) | −1.2° ± 2.3° (−6.2 to 2.1) | −1.1° ± 2.4° (−4.8 to 2.1) | 0.869a |
Note: Data presented as mean ± SD (range) or n (%). A negative value and negative change indicates the presence of kyphosis or the addition of kyphosis. Boldface indicates a statistically significant difference.
↵a Kruskal-Wallis test employed; Kyphosis° (kyphosis angle).