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Table 1 Influence of gender, age, diagnosis and function at baseline on fall rate stratified by different time intervals after admission to the rehabilitation clinic

From: Fall risk as a function of time after admission to sub-acute geriatric hospital units

  Day 2–7 Day 8–14 Day 15–21 Day 22–28 >28 days
Person-days at risk (n) 30,666 33,219 28,565 11,641 5,366
Falls (n) 403 311 249 100 52
Incidence rate ratio (95 % confidence interval) b
 Gender
  Women 1.00a 1.00a 1.00a 1.00a 1.00a
  Men 1.45 (1.13;1.85) 1.17 (0.88;1.55) 1.49 (1.10;2.02) 1.61 (1.01;2.57) 0.97 (0.54;1.76)
  Age (increase of one year) 1.00 (0.98;1.02) 1.00 (0.98;1.01) 1.01 (0.99;1.03) 0.97 (0.95;1.00) 0.97 (0.94;1.01)
Diagnosis
 All except femoral fracture and stroke 1.00a 1.00a 1.00a 1.00a 1.00a
 Femoral fracture 0.80 (0.60;1.06) 0.64 (0.46;0.89) 0.75 (0.53;1.05) 0.93 (0.55;1.56) 1.18 (0.59;2.37)
 Stroke 1.24 (0.88;1.74) 1.14 (0.78;1.66) 1.36 (0.89;2.07) 2.06 (1.13;3.76) 2.24 (1.10;4.58)
Barthel Index
  ≥ 60 1.00a 1.00a 1.00a 1.00a 1.00a
  < 60 2.22 (1.73;2.85) 2.42 (1.83;3.19) 2.30 (1.66;3.18) 1.78 (1.04;3.05) 1.07 (0.50;2.29)
Orientation
 Fully oriented 1.00a 1.00a 1.00a 1.00a 1.00a
 Disoriented 1.99 (1.57;2.53) 1.66 (1.28;2.14) 1.54 (1.13;2.11) 1.41 (0.85;2.33) 1.18 (0.58;2.40)
  1. aReference group
  2. bNegative binomial regression analysis; the columns represent independent models for each time interval