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Figure 2 Incidence of falls in subgroups classified according to standing systolic blood pressure (BP) level. Global 
2-values are 18.2 (p = 0.001) for total group, 13.5 (p = 0.009) for women and 5.6 (p = 0.23) for men. Multiple logistic regression analysis including female gender (female = 1, male = 0), standing BP subgroup and their interaction showed that falls were significantly associated with female gender (RR = 4.0, p < 0.05).