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. Author manuscript; available in PMC: 2013 Apr 27.
Published in final edited form as: Lancet. 2012 Sep 5;380(9852):1473–1481. doi: 10.1016/S0140-6736(12)60862-9

TABLE 3c.

Adjusted risk-ratios and rates for survival to discharge by hospital quartile: PEA/asystole and VT/VF*

PEA/asystole* VT/VF**
Total
 64,339 patients at 435 hospitals		 Adjusted risk- ratio (95% CI) Adjusted rate P Adjusted risk- ratio (95% CI) Adjusted rate P
Quartile 1
 13,994 patients at 113 hospitals Median: 16 minutes		 Ref 10·2% Ref Ref 32·1% Ref
Quartile 2
 18,783 patients at 121 hospitals Median: 19 minutes		 1·06 (0·94–1·18) 10·7% 0·351 1·03 (0·96–1·11) 33·2% 0·399
Quartile 3
 19,106 patients at 107 hospitals Median: 22 minutes		 1·09 (0·97–1·23) 11·1% 0·132 0·98 (0·90–1·06) 31·4% 0·570
Quartile 4
 12,456 patients at 94 hospitals Median: 25 minutes		 1·20 (1·05–1·36) 12·2% 0·006 1·02 (0·93–1·12) 32·8% 0·662

PEA = pulseless electrical activity; VT = ventricular tachycardia; VF = ventricular fibrillation

*

P for interaction 0·002

P for trend 0·005

**

P for trend 0·886