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Table 2 Association between selected variables and falls among institutionalized older adults in Madrid, Spain

From: Factors associated with falls among older adults living in institutions

Variables

Crude RR

RRa (95% CI)

RRb (95% CI)

Male gender

1.21

1.37 (0.74-2.53)

1.12 (0.60-2.07)

Age (per 5 y)

1.02

0.95 (0.81-1.11)

0.86 (0.71-1.03)

Marital status (no spouse)

1.00

1.27 (0.72-2.26)

1.71 (0.93-3.17)

Education

   

 Less than primary

1.00

1.00

1.00

 Primary

1.27

1.22 (0.63-2.37)

1.06 (0.53-2.12)

 Secondary or higher

1.30

1.09 (0.49-2.45)

1.17 (0.54-2.52)

Length of stay (years)

   

  0-2

1.00

1.00

1.00

  3-5

1.05

1.11 (0.61-2.02)

1.34 (0.72-2.50)

  ≥ 6

1.38

1.50 (0.78-2.87)

1.31 (0.68-2.53)

Facility size (per 50 beds)

1.01

1.03 (0.94-1.13)

1.01 (0.93-1.10)

Facility

   

 Public

1.00

1.00

1.00

 Subsidized

1.69

1.14 (0.59-2.20)

1.41(0.62-3.20)

 Private

1.29

1.02 (0.49-2.14)

1.13 (0.57-2.23)

No. of diseases (per 1)

1.40

1.40 (1.27-1.54)

1.32 (1.17-1.50)

No. of medications (per 1)

1.27

1.19 (1.06-1.33)

1.07 (0.95-1.21)

Antidepressant use

3.30

3.40 (1.65-7.04)

2.32 (1.22-4.40)

Anxiolytic use

1.73

1.64 (0.80-3.36)

1.48 (0.75-2.91)

Hypnotic use

0.56

0.50 (0.23-1.08)

0.62 (0.24-1.56)

Antipsychotic use

1.26

0.73 (0.36-1.49)

0.92 (0.47-1.82)

Functional dependence

   

  Independent (100c)

1.00

1.00

1.00

  Mild (91-99)

2.24

2.16 (0.70-6.60)

1.89 (0.60-5.97)

  Moderate (61-90)

3.58

2.76 (1.19-6.37)

2.39 (0.87-6.55)

  Severe (21-60)

6.17

5.03 (1.77-14.28)

3.02 (1.17-7.78)

 Total (0-20)

1.83

0.89 (0.24-3.25)

0.86 (0.26-2.82)

Use of cane

1.59

2.07 (0.93-4.61)

1.55 (0.79-3.07)

Use of walker

2.29

1.33 (0.63-2.80)

0.91 (0.46-1.82)

Behavioural problems

1.98

1.32 (0.64-2.74)

1.09 (0.56-2.11)

Cognitive status

   

  Normal (≤2d)

1.00

1.00

1.00

  Mild (3–4)

1.10

0.77 (0.35-1.70)

0.78 (0.33-1.83)

  Moderate (5–7)

1.52

0.90 (0.42-1.94)

0.68 (0.29-1.60)

  Severe (≥8)

1.77

1.85 (0.58-5.87)

2.15 (0.82-5.65)

Vision (moderate/severe)

1.22

0.89 (0.51-1.57)

0.90 (0.55-1.47)

Hearing (moderate/severe)

0.97

0.90 (0.38-2.13)

1.11 (0.49-2.54)

Insomnia

1.21

1.16 (0.63-2.15)

0.88 (0.50-1.55)

Urinary incontinence

3.42

2.89 (1.48-5.65)

2.56 (1.32-4.94)

Physical restraint

1.11

0.74 (0.28-1.93)

0.63 (0.29-1.36)

Self-rated health (fair/poor/very poor)

2.00

1.65 (0.93-2.95)

1.34 (0.74-2.41)

Physician-rated health (fair/poor/very poor)

2.31

2.11 (1.18-3.78)

0.97 (0.55-1.71)

Depressive symptoms (per 1 GDS point)

1.14

1.06 (0.95-1.19)

1.01 (0.92-1.11)

  1. Abbreviations: CI = confidence interval; GDS = Geriatric Depression Scale; RR = rate ratio.
  2. a Rate ratio adjusted for age, sex, cognitive status, and functional dependence.
  3. b Additionally adjusted for number of diseases and number of medications (for psychotropic the particular index drug was excluded from the count).
  4. c Barthel Index score.
  5. d Pfeiffer's Short Portable Mental Status Questionnaire score.