Table 3. Mortality, length of hospital stay and hospital cost for AF patients.

Variables	HAP Subgroup Group [Total number = 275, mean (SD) or n (%)]	NHAP Subgroup Group [Total number = 787, mean (SD) or n (%)]	P-Value
Mortality	18 (6.57%)	19 (2.42%)	0.003
Hospital stay (day)	15.9±10.2	9.1±5.9	<0.001
Cost (RMB)	13845.4±5801.3	10607.8±4537.9	0.002

^a t = 5.935, P<0.001