2 Physical activity as a risk or protective factor | 27 Table 2.2 Generalized estimating equation models for falls Model 1: physical activity Model 2: frailty Model 3: physical activity, frailty and interaction term Model 4: physical activity, frailty, age and sex OR 95% CI p value OR 95% CI p value OR 95% CI p value OR 95% CI p value Physical activity (minutes/day) 1.00 0.99-1.00 0.26 1.00 1.00-1.00 0.65 1.00 1.00-1.01 0.39 Frailty Non-frail Frail Ref 1.71 1.33-2.20 < 0.001 Ref 2.21 1.33-3.68 0.002 Ref 1.69 1.19-2.40 0.004 Physical activity * frailty 1.00 1.00-1.00 0.27 Age 1.04 1.00-1.07 0.06 Sex Men Women Ref 1.30 0.94-1.80 0.12 OR Odds ratio, CI Confidence Interval, Ref Reference group. Analysis included 311 respondents and 1144 observations.
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