Table 3 Adjusted Cox proportional hazards models predicting 1-year post-discharge mortality
Characteristics | Non-sepsis (n = 142,646) | Sepsis (n = 1857) | ||
|---|---|---|---|---|
Mortality, % | HR (95% CI) | Mortality, % | HR (95% CI) | |
Year of admission†| ||||
 2007 | 4.1 | 1.00 | 16.7 | 1.00 |
 2008 | 4.1 | 1.03 (0.95–1.12) | 10.9 | 0.70 (0.43–1.14) |
 2009 | 3.9 | 1.03 (0.94–1.12) | 11.8 | 0.76 (0.48–1.21) |
 2010 | 3.7 | 1.05 (0.92–1.19) | 16.1 | 1.04 (0.76–1.43) |
 2011 | 3.7 | 1.05 (0.96–1.15) | 14 | 0.88 (0.60–1.31) |
 2012 | 3.5 | 0.98 (0.89–1.09) | 11.8 | 0.78 (0.48–1.28) |
Age groups | ||||
 ≥18 years to <35 years | 0.5 | 1.00 | 6.6 | 1.00 |
 ≥35 years to <55 years | 0.9 | 1.99** (1.35–2.93) | 7.5 | 1.10 (0.40–3.04) |
 ≥55 years to <75 years | 2.1 | 5.46** (3.77–7.92) | 10.8 | 1.60 (0.76–3.38) |
 ≥75 years | 9.2 | 20.0** (13.5–29.6) | 22.1 | 3.50** (1.56–7.87) |
Sex | ||||
 Male | 4.3 | 1.00 | 13.4 | 1.00 |
 Female | 3.4 | 0.76** (0.71–0.82) | 13.7 | 1.05 (0.81–1.37) |
Country of birth | ||||
 Australia and New Zealand | 4.1 | 1.00 | 13.9 | 1.00 |
 United Kingdom, United States and Canada | 4.4 | 0.96 (0.88–1.05) | 11.7 | 0.66 (0.36–1.19) |
 Non-English-speaking Europe | 4.1 | 0.83** (0.74–0.93) | 17.3 | 0.97 (0.69–1.36) |
 North Africa | 1.5 | 0.50** (0.44–0.58) | 7.7 | 0.52 (0.18–1.53) |
 Asia | 1.9 | 0.68** (0.54–0.85) | 10.8 | 0.80 (0.37–1.72) |
 Others | 1.7 | 0.66** (0.53–0.83) | 6.5 | 0.47 (0.18–1.21) |
 Unknown | 5.6 | 1.02 (0.81–1.28) | 17.2 | 1.45 (0.76–2.78) |
Marital status | ||||
 Married | 2.9 | 1.00 | 12.4 | 1.00 |
 Single | 4.8 | 1.37** (1.28–1.46) | 14.9 | 1.10 (0.89–1.36) |
 Unknown | 6.4 | 1.67** (1.37–2.03) | 12.8 | 0.93 (0.39–2.24) |
Severity of illness/co-morbidity | ||||
 Normal | 2.5 | 1.00 | 9.2 | 1.00 |
 Moderate | 7.5 | 2.04** (1.88–2.21) | 9.9 | 0.96 (0.61–1.50) |
 Severe | 10.1 | 2.34** (2.01–2.72) | 20.2 | 2.05** (1.45–2.89) |
 Very severe | 15.5 | 3.34** (2.99–3.72) | 24.6 | 2.17** (1.49–3.17) |
SEIFA quartiles | ||||
 First quartile (most disadvantaged) | 4.0 | 1.00 | 14.9 | 1.00 |
 Second quartile | 3.7 | 0.93 (0.85–1.00) | 13.2 | 0.91 (0.65–1.26) |
 Third quartile | 3.5 | 0.94 (0.83–1.06) | 11.8 | 0.71* (0.52–0.97) |
 Fourth quartile (most advantaged) | 4.3 | 0.99 (0.80–1.23) | 13.1 | 0.68 (0.35–1.32) |
 Unknown | 2.4 | 0.64* (0.41–1.00) | 20.8 | 1.59 (0.90–2.84) |
Local health district of facility | ||||
 Metropolitan | 3.7 | 1.00 | 13.8 | 1.00 |
 Rural and regional NSW | 4.3 | 1.06 (0.88–1.27) | 12.6 | 0.81 (0.60–1.10) |
 Others | 3.1 | 0.72** (0.64–0.81) | 12.9 | 1.08 (0.70–1.67) |
Peer hospital group | ||||
 Principal referral group | 3.9 | 1.00 | 12.4 | 1.00 |
 Ungrouped acute | 2.2 | 0.59** (0.44–0.80) | 0 | – |
 Major metropolitan and non-metropolitan | 4 | 1.20 (1.00–1.45) | 17.1 | 1.53* (1.10–2.11) |
 District groups 1 and 2 | 2.7 | 1.10 (0.85–1.44) | 12.2 | 1.04 (0.40–2.73) |
Major surgical procedure | ||||
 CABG | 2.0 | 1.00 | 7.0 | 1.00 |
 Abdominal surgery | 2.8 | 1.91** (1.50–2.43) | 8.3 | 1.25 (0.61–2.56) |
 EVAR | 7.3 | 2.40** (1.92–3.00) | 25.0 | 3.79** (1.39–10.3) |
 Total hip replacement | 1.5 | 0.80 (0.62–1.03) | 11.1 | 1.51 (0.47–4.78) |
 Total knee replacement | 0.8 | 0.46** (0.36–0.59) | 5.3 | 0.68 (0.19–2.42) |
 Other | 6.1 | 3.13** (2.50–3.91) | 19.0 | 2.69** (1.38–5.22) |
Length of stay |  | 1.01** (1.01–1.01) |  | 1.00** (1.00–1.01) |