Table 1.

Surgical Apgar score used in this study

	Surgical Apgar score, no. of points
	0	1	2	3	4
Estimated blood loss (ml)	>1000	601–1000	101–600	≤100
Lowest mean arterial pressure (mmHg)	<40	40–54	55–69	≥70
Lowest heart rate (min)	>85	76–85	66–75	56–65	≤55

This table was prepared from the article written by Gawande et al. [9]