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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