Surgical intervention | Odds ratio (95% CI) | |
---|---|---|
 | Crude n = 1572* | Adjusted n = 1555 |
Socio-demographic factors | Â | Â |
   Age | 0.98 (0.96, 0.99) | 0.98 (0.96, 0.99) |
   Female | 0.88 (0.60, 1.30) | 0.84 (0.56, 1.27) |
   Living alone | 1.49 (0.68, 3.24) |  |
   Low education (primary only or illiterate) | 1.07 (0.72, 1.59) |  |
   Main lifetime occupation type†|  |  |
Manual work | 1.01 (0.66, 1.55) | Â |
None reported | 0.94 (0.48, 1.82) | Â |
Hospital factors | Â | Â |
   Level three vs level two category | 2.77 (0.87, 8.85) |  |
   Large size (>500 beds) | 1.63 (0.53, 5.00) |  |
   Teaching status | 2.02 (0.49, 8.38) |  |
   Situated in a rich provincial area | 1.11 (0.42, 2.90) |  |
   Situated in northern China | 0.97 (0.37, 2.53) |  |
Medical history | Â | Â |
   ≥ 2 cardiovascular risk factors‡ | 0.70 (0.46, 1.07) |  |
   Current smoker | 1.14 (0.74, 1.76) |  |
   Regular alcohol consumption | 1.37 (0.91, 2.07) |  |
   Overweight (body mass index ≥24) | 1.72 (1.17, 2.52) | 1.68 (1.12, 2.51) |
Clinical features | Â | Â |
   Time from symptom onset to hospital presentation |  |  |
<6 hours | 1.41 (0.93, 2.11) | Â |
Unknown | -§ |  |
   Poor admission GCS score | 4.04 (2.70, 6.04) | 3.83 (2.51, 5.83) |
   Clinical classification - TACS | 3.08 (1.84, 5.16) | 2.23 (1.30, 3.83) |