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Table 3 Multivariate survival analysis: Patient and provider characteristics associated with 1-year mortality after hip fracture

From: Incidence and mortality of hip fracture among the elderly population in South Korea: a population-based study using the National Health Insurance claims data

 

Variables

N (%)

Hazard ratio

95% confidence interval

Gender

Female

6,892 (70.2)

1.000

 
 

Male

2,925 (29.8)

1.400

(1.260-1.557)

Age (years)

50-59

576 (5.9)

1.000

 
 

60-69

2,135 (21.7)

1.787

(1.250-2.553)

 

70-79

3,772 (38.4)

2.879

(2.041-4.062)

 

80-89

2,923 (29.8)

4.742

(3.361-6.691)

 

≥ 90

411 (4.2)

9.273

(6.387-13.463)

Residence

Seoul (Capital city)

2,388 (24.3)

1.000

 
 

Metropolitan city

2,584 (26.3)

1.291

(1.120-1.488)

 

Small city

4,133 (42.1)

1.214

(1.058-1.392)

 

Others (none-city area)

712 (7.3)

1.656

(1.344-2.039)

Health

insurance

National Health Insurance program

8,514 (86.7)

1.000

 
 

National Medical Aid program

1,303 (13.3)

1.300

(1.136-1.488)

Baseline

0

4,742 (48.3)

1.000

 

   Charlson

1

4,038 (41.1)

1.339

(1.198-1.496)

   Index (before hip fracture)

2

938 (9.6)

2.625

(2.264-3.042)

 

3, 6

99 (1.0)

5.693

(4.249-7.627)

Type of

hip fracture

Neck fracture

5,435 (55.4)

1.000

 
 

Petrochanteric fracture.

3,733 (38.0)

1.090

(0.966-1.230)

 

Neck + Petrochanteric fracture.

649 (6.6)

1.031

(0.843-1.261)

Type of operation

Total hip replacement (ICD 10th procedure code: N0711)

4,574 (46.6)

1.000

 
 

Open reduction/internal fixation (N0601)

4,592 (46.8)

0.963

(0.855-1.084)

 

Closed reduction/percutaneous fixation (N0991)

397 (4.0)

0.958

(0.720-1.274)

 

Hip hemiarthroplasty (N0715)

216 (2.2)

0.793

(0.536-1.174)

 

Total hip replacement & Open reduction (N0711 + N0601)

38 (0.4)

1.213

(0.575-2.561)

Treatment*

No

7,761 (79.1)

1.000

 
 

Yes

2,056 (20.9)

0.576

(0.499-0.666)

Type of hospital providing operation

Tertiary hospital

2,714 (27.6)

1.000

 
 

General hospital

4,649 (47.4)

0.900

(0.796-1.018)

 

Hospital

1,901 (19.4)

0.798

(0.680-0.937)

 

Clinic

553 (5.6)

0.746

(0.573-0.972)

  1. * Treatment was defined as whether the patient took at least one prescription of anti-osteoporosis medicine after hip fracture.
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