Prof. Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, Shanghai, China (People's Republic)
Objectives : To explore whether physical activity (PA) levels are impaired in patients with mild-to-moderate adolescent idiopathic scoliosis (AIS) and to investigate the association between AIS and PA via the isotemporal substitution model (ISM).
Design: This study recruited 40 patients with mild to moderate AIS and 20 age-matched healthy controls. The primary outcome was time spent in sedentary behavior, light physical activity (LPA), moderate physical activity (MPA), and vigorous physical activity (VPA) measured by the Actigraph GT3X+ accelerometer (ActiGraph, USA). The secondary outcome was screen time measured by the self-report questionnaire. ISM was used to examining the associations between AIS and PA.
Results: Inter-group comparison showed that the adolescent idiopathic scoliosis group had less MPA time (P=0.008) and VPA time (P< 0.001). The duration of moderate-to-vigorous physical activity (MVPA) in the AIS group was lower than that in the control group (P=0.002). The ISM revealed that substituting 10 minutes of sedentary behavior (SB) with 10 minutes of MVPA was adversely related to the incidence of AIS (OR = 0.448, 95% CI= 0.246-0.970).
Conclusion: Patients with mild to moderate AIS have lower PA levels than healthy controls, and increasing MVPA to replace SB may reduce the incidence of AIS.
