82 | Chapter 5 Table 5.2. The mean number and incidence rate ratio of falls and fall-related injuries of the intervention group and control group. The mean number of falls and injuries are presented per person per year. Intervention group (mean (SE)) Control group (mean (SE)) IRR crude analysis (95% CI) IRR adjusted for confounders1 (95% CI) IRR adjusted for confounders (95% CI) Main analysis n = 131 n = 133 Mean number of falls 1.67 (0.24) 1.98 (0.37) 0.85 (0.52;1.42) 0.85 (0.52; 1.42) 0.85 (0.51; 1.43)2 Mean number of injuries 0.70 (0.11) 0.97 (0.18) 0.73 (0.44; 1.20) 0.73 (0.44; 1.19) 0.73 (0.44; 1.19)1 Stratified for frailty status Non-frail n = 40 n = 37 Mean number of falls 1.40 (0.24) 1.76 (0.37) 0.80 (0.46; 1.40) 0.79 (0.45; 1.37) 0.88 (0.51; 1.53)3 Mean number of injuries 0.38 (0.11) 0.94 (0.23) 0.40 (0.18; 0.89) 0.39 (0.18; 0.87) 0.39 (0.18; 0.87)1 Pre-frail n = 91 n = 96 Mean number of falls 1.79 (0.32) 2.06 (0.45) 0.88 (0.48; 1.61) 0.87 (0.48; 1.60) 0.82 (0.46; 1.49)4 Mean number of injuries 0.84 (0.14) 0.98 (0.21) 0.86 (0.49; 1.52) 0.86 (0.49; 1.51) 0.82 (0.46; 1.46)5 Per-protocol n = 54 n = 130 Mean number of falls 1.84 (0.37) 1.96 (0.38) 0.95 (0.57; 1.60) 0.98 (0.57; 1.68) 0.88 (0.52; 1.47)6 Mean number of injuries 0.72 (0.17) 0.96 (0.18) 0.76 (0.43; 1.35) 0.76 (0.42; 1.35) 0.62 (0.34; 1.12)7 IRR = Incidence Rate Ratio: intervention group regarding control group. The incidence rate ratio (IRR) was calculated by exponentiating the estimated coefficients from the negative binomial regression model. Table showing the mean number of falls and injuries, which equals the fall and injury rate, as all missing data has been imputed. The mean number of falls and injuries are presented per person per year. 1 Analysis adjusted for age, sex and physical activity, 2 Analysis adjusted for age, sex, physical activity, smoking, incontinence, number of falls in year before participation in study, walking aid and physiotherapy, 3 Analysis adjusted for age, sex, physical activity, Mini-Mental State Examination, marital status, number of falls in year before participation in study, use of vision aids and use of walking aid, 4 Analysis adjusted for age, sex, physical activity, Mini-Mental State Examination, education, smoking, incontinence, number of falls in year before participation in study, use of walking aid and physiotherapy, 5 Analysis adjusted for age, sex, physical activity, Mini-Mental State Examination, having children, incontinence, number of falls in year before participation in study, use of vision aid, use of walking aid and physiotherapy 6 Analysis adjusted for age, sex, physical activity, Body Mass Index, Mini-Mental State Examination, living alone, education, smoking, use of alcohol, dizziness, incontinence, number of falls in year before participation in study, use of vision aid, use of hearing aid, use of walking aid and physiotherapy, 7 Analysis adjusted for age, sex, physical activity, dizziness, number of falls in year before participation in study, use of walking aid and physiotherapy CI in bold means p < 0.05
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