Halo gravity traction for pediatric scoliosis and kyphoscoliosis: A review of current evidence and best practices

Table 2 Change in body mass index before and after halo gravity traction, mean ± SD

Ref.	Year	Sample size	Mean follow-up	Mean age at surgery (years)	BMI before traction (kg/m2)	BMI at surgery (kg/m2)	Duration of halo in days	Maximum weight applied (SD)
Wang et al[28]	2024	33	NA	17.79	17.2 ± 3.9	17.7 ± 3.7	129 ± 63	45.2% (± 13.2%) of body weight
Iyer et al[9]	2019	30	16 months	9.0	15.1 ± 1.9	16.1 ± 2.0	79 ± 43	50% of body weight

BMI: Body mass index; NA: Not available.