Table 2.

Association between liver dysfunction and the risk of mortality in patients receiving elective orthopedic surgery

Liver function	Total number	Number of mortality (%)	Unadjusted HR (95% CI)	Adjusted HR (95% CI)
Elevated liver enzyme level
No (SGOT ≤ 40)	448,327	1214 (0.3)	1.00	1.00
Yes (SGOT > 40)	29,197	194 (0.7)	2.46 (2.11–2.86)	1.62 (1.39–1.90)
40 < SGOT ≤ 80	24,821	136 (0.6)	2.03 (1.70–2.42)	1.41 (1.18–1.69)
80 < SGOT ≤ 200	3961	42 (1.1)	3.93 (2.89–5.34)	2.09 (1.53–2.86)
SGOT > 200	415	16 (3.9)	14.51 (8.86–23.76)	6.36 (3.84–10.53)

P for trend: < 0.0001