Table 1 Basic characteristics and factors predicting four-month mortality and maintainability among hip fracture patients in Finland, years 1998-2001

Number of observations

22,857

22,857

22,857

10,384

10,384

10,384

Number of events

4,299

9,991

1,714

4,833

Demographic variables

   Age** (mean)

77.4

1.91 (1.83 to 2.00)

1.21 (1.19 to 1.24)

81.1

2.04 (1.87 to 2.22)

1.27 (1.20 to 1.35)

   Men

29.7

2.11 (1.95 to 2.28)

1.50 (1.41 to 1.60)

24.6

1.97 (1.74 to 2.22)

1.52 (1.39 to 1.67)

Type of fracture

   Neck of femur

63.2

1

1

62.1

1

1

   Trochanteric

30.0

1.01 (0.94 to 1.09)

0.93 (0.87 to 0.98)

31.3

1.00 (0.89 to 1.13)

0.89 (0.82 to 0.97)

   Subtrochanteric

6.8

1.12 (0.97 to 1.30)

1.03 (0.92 to 1.15)

6.8

1.07 (0.86 to 1.33)

0.90 (0.76 to 1.05)

Care history

   Long-term care patient

17.8

1.02 (0.93 to 1.12)

0.60 (0.55 to 0.65)

-

-

-

   Recent short-term care

23.6

1

1

13.3

1

1

   No recent care

58.6

0.46 (0.43 to 0.50)

0.54 (0.51 to 0.58)

86.7

0.40 (0.35 to 0.46)

0.58 (0.51 to 0.65)

Comorbid conditions

   Cancer

11.3

1.68 (1.53 to 1.86)

1.46 (1.34 to 1.59)

12.2

1.77 (1.53 to 2.05)

1.47 (1.30 to 1.66)

   Diabetes

10.1

1.33 (1.19 to 1.48)

1.40 (1.28 to 1.53)

10.6

1.25 (1.06 to 1.48)

1.40 (1.23 to 1.60)

   Parkinson's disease

2.9

1.14 (0.95 to 1.38)

1.30 (1.11 to 1.53)

3.0

1.22 (0.90 to 1.65)

1.55 (1.23 to 1.97)

   Cardiovascular disease

34.2

1.50 (1.39 to 1.61)

1.38 (1.30 to 1.47)

36.9

1.32 (1.18 to 1.48)

1.28 (1.17 to 1.39)

   Cerebrovascular disease

18.9

1.14 (1.05 to 1.24)

1.15 (1.07 to 1.23)

18.2

1.24 (1.08 to 1.41)

1.22 (1.10 to 1.36)

   Peripheral vascular disease

4.5

1.20 (1.04 to 1.40)

1.28 (1.12 to 1.46)

4.9

1.56 (1.25 to 1.95)

1.55 (1.28 to 1.87)

   Chronic pulmonary disease

8.5

1.24 (1.11 to 1.39)

1.30 (1.18 to 1.44)

9.3

1.27 (1.06 to 1.51)

1.32 (1.15 to 1.52)

   Peptic ulcer disease

3.7

1.08 (0.91 to 1.28)

1.25 (1.08 to 1.44)

4.0

1.17 (0.90 to 1.52)

1.28 (1.04 to 1.56)

   Renal disease

0.9

2.05 (1.52 to 2.76)

1.98 (1.47 to 2.67)

0.9

1.83 (1.15 to 2.91)

1.84 (1.18 to 2.86)

   Rheumatologic disease

5.3

0.96 (0.81 to 1.13)

1.21 (1.07 to 1.36)

6.1

0.99 (0.78 to 1.25)

1.34 (1.14 to 1.59)

C-statistics

0.74

0.65

0.71

0.63