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Table 3 Risk factors for 7-day, 30-day, 180-day and 1-year mortality using Cox regression analysis with crude hazard ratios (cHRs) and 95% confidence intervals (CIs)

From: The effects of cement fixation on survival in elderly patients with hip hemiarthroplasty: a nationwide cohort study

  

7 days

  

30 days

  

180 days

  

1 year

 
 

cHR

(95% CI)

P

cHR

(95% CI)

P

cHR

(95% CI)

P

cHR

(95% CI)

P

Fixation method (Ref: Uncemented)

 Cemented

1.72

1.23–2.39

0.001

1.29

1.12–1.48

< 0.001

1.12

1.04–1.20

0.003

1.08

1.02–1.15

0.007

Gender (Ref: Female)

 Male

1.50

1.09–2.07

0.014

1.67

1.45–1.92

< 0.001

1.73

1.61–1.86

< 0.001

1.76

1.66–1.86

< 0.001

Age group (Ref: 80–84 years)

 85–89 years

1.68

1.15–2.44

0.007

1.48

1.26–1.74

< 0.001

1.39

1.27–1.51

< 0.001

1.30

1.22–1.39

< 0.001

  ≥ 90 years

2.02

1.33–3.08

0.001

2.23

1.87–2.66

< 0.001

1.94

1.76–2.13

< 0.001

1.82

1.69–1.96

< 0.001

Insurance status (Ref: ≥US $840)

  < US $840

0.89

0.64–1.23

0.468

0.87

0.76–1.00

0.054

0.96

0.89–1.03

0.221

0.95

0.90–1.01

0.077

CCI score (Ref: CCI = 0)

 CCI ≥ 1

1.30

0.85–1.98

0.231

1.53

1.26–1.86

< 0.001

1.62

1.46–1.79

< 0.001

1.57

1.45–1.70

< 0.001

Type of head (Ref: BHA)

 UHA

1.28

0.93–1.11

0.133

1.06

0.92–1.22

0.416

1.04

0.96–1.11

0.364

1.07

1.01–1.13

0.034

Hospital type (Ref: Private)

 Public

0.97

0.69–1.35

0.843

1.04

0.90–1.20

0.582

1.04

0.96–1.12

0.326

1.07

1.01–1.13

0.034

Hospital level (Ref: Medical centre)

 Non-medical centre

1.01

0.71–1.43

0.964

1.10

0.95–1.29

0.214

1.13

1.05–1.23

0.003

1.11

1.04–1.18

0.002

Hospital volume (Ref: High)

 Low

1.14

0.82–1.60

0.428

1.10

0.96–1.27

0.185

1.18

1.10–1.28

< 0.001

1.15

1.09–1.23

< 0.001

Surgeon volume (Ref: High)

 Low

1.17

0.83–1.60

0.362

1.20

1.04–1.40

0.015

1.17

1.08–1.26

< 0.001

1.20

1.13–1.27

< 0.001