Association between Cervical Curvature and Sleep Factors among Chinese Adult Population

Background: Cervical curvature plays a key role in supporting the head and enabling neck movements. Its alteration is linked to neck pain and musculoskeletal disorders. Sleep-related factors can influence cervical alignment, yet their effects remain underexplored. This study investigates the association of sleep factors with cervical curvature to inform preventive strategies and clinical guidance. Objective: To assess the association between sleep factors like sleeping position, duration, and pillow height with cervical curvature among the adults undergoing cervical spine MRI. Methods: This study was hospital based and cross-sectional. It was conducted among 610 adults. The participants were of 30-59 years age. They were attending a tertiary care Chinese hospital for cervical spine MRI. A validated literature based questionnaire was used to collect the data related to sleep factors, socio-demographic, ergonomic, and lifestyle variables. Cervical curvature was evaluated using MRI-based Cobb angle measurement from cervical spine C2-C7. Cervical spine curvature was classified based on the Cobb angle a ‘lordotic’ type if the angle was between >7° and -7° and