Aim 1 primary outcomes. Adjusted for age and BMI, no associations were detected between years working in ranching or farming and A, the probability of reporting joint pain; B, the probability of reporting a diagnosis of arthritis; C – the WOMAC score. In Figures 1A and 1B, the observed binary responses are clustered at the upper and lower edges of the plots (lower: no joint pain or no diagnosis of arthritis; upper: positive joint pain or diagnosis of arthritis). In Figure 1C, the dashed line is the estimated association between years worked and mean WOMAC score, adjusted for age and BMI, with 95% confidence bands. Data points are added for reference.