Table 2. Comparisons of length of hospital stay and medical expenses between patients with or without pulmonary abscess in different sex and age groups.

	Patients with pulmonary abscess (N = 190)	Patients without pulmonary abscess (N = 12,189)	P
Length of hospital stay, days, M ± SD	21.8 ± 19.5	12.7 ± 9.3	<0.01
Sex
Male	23.1 ± 21.7	12.8 ± 9.6	<0.01
Female	17.8 ± 9.8	12.4 ± 8.7	<0.01
Age groups
<45	23.0 ± 17.4	11.6 ± 8.7	<0.01
≥45, <60	19.1 ± 14.36	12.0 ± 9.4	<0.01
≥60, <75	23.3 ± 21.2	12.0 ± 8.2	<0.01
≥75, <90	22.6 ± 25.2	14.4 ± 10.3	<0.01
≥90	19.5 ± 10.6	16.9 ± 13.0	0.26
Medical expenses, CNY, M ± SD	35,325 ± 56,871	27,818 ± 171,658	0.55
Sex
Male	39,298 ± 64,604	30,121 ± 213,232	0.61
Female	23,571 ± 17,215	23,747 ± 34,089	0.97
Age groups
<45	39,322 ± 64,181	15,370 ± 23,527	<0.01
≥45, <60	25,826 ± 25,074	21,501 ± 34,331	0.34
≥60, <75	32,706 ± 49,289	27,534 ± 269,779	0.87
≥75, <90	50,390 ± 90,473	37,591 ± 54,307	0.19
≥90	118,762 ± 149,421	54,774 ± 102,438	0.38

Note:

CNY, Chinese yuan; M ± SD, mean ± standard deviation.