Figure 5. Associations between alternative weekend-warrior definitions and incident osteoarthritis. HRs and 95% CIs were estimated using Cox proportional hazards models adjusted for age at accelerometer assessment, sex, ethnicity, education, Townsend deprivation index, smoking status, alcohol intake frequency, and BMI. a, WW defined as accumulating >=50% of total weekly MVPA during any one or two consecutive days. b, WW defined as accumulating >=50% of total weekly MVPA during one or two weekend days. c, WW and regularly active patterns defined at top-two-day concentration thresholds from 55% to 95% in 5-percentage-point increments. At every definition, inactive participants accumulated <150 min/week of MVPA; among participants accumulating >=150 min/week, WW participants met the stated concentration threshold and regularly active participants did not. The reference group was inactive. Incident overall OA was defined as the first recorded ICD-10 M15-M19 diagnosis during follow-up among participants without OA at baseline. Squares indicate HR estimates and horizontal lines indicate 95% CIs. Abbreviations: BMI, body mass index; CI, confidence interval; HR, hazard ratio; ICD-10, International Classification of Diseases, 10th Revision; MVPA, moderate-to-vigorous physical activity; OA, osteoarthritis; WW, weekend warrior.