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Table 3 Multivariable Cox regression analysis for the risk factors associated with 1-year and total mortality

From: Systemic immune-inflammation index independently predicts poor survival of older adults with hip fracture: a prospective cohort study

Variables

1-year mortality

Total mortality

HR (95% CI)

p value

HR (95% CI)

p value

Age (per 1 year increase)

1.04 (0.98–1.10)

0.173

1.06 (1.02–1.10)

0.003

Sex (male vs. female)

2.82 (1.26–6.71)

0.011

1.72 (0.98–3.01)

0.056

CCI = 0

1.00 (Reference)

–

1.00 (reference)

–

CCI = 1

1.35 (0.45–4.02)

0.585

1.00 (0.49–1.98)

0.991

CCI ≥ 2

5.04 (1.84–14.51)

0.002

2.97 (1.45–5.98)

0.003

Time to surgery (per 1 day increase)

1.02 (0.99–1.09)

0.639

1.07 (1.02–1.13)

0.016

Albumin (<  3.5 g/dL vs. ≥ 3.5 g/dL)

2.93 (1.29–6.88)

0.010

1.83 (1.03–3.22)

0.040

SII (per 100 units increase)b

1.08 (1.01–1.17)

0.033

1.09 (1.03–1.15)

0.003

  1. Adjusted for age, sex, CCI score, time to surgery and albumin level
  2. Abbreviation: HR Hazard ratio, CI Confidence interval, CCI Charlson comorbidity index, SII Systemic immune-inflammation index