Table 1.

Comparison of demographics and comorbidities between patients with and without appendectomy.

	Appendectomy
	Yes (N = 246,562)	No (N = 246,562)
	n (%)	n (%)	p-value
Age, years			0.99
20–34	94,814 (38.5)	94,814 (38.5)
35–49	74,812 (30.3)	74,812 (30.3)
>50	76,936 (31.2)	76,936 (31.2)
Mean (SD)†	43.3 (16.7)	43.1 (16.9)	<0.001
Gender			0.99
Female	119,806 (48.6)	119,806 (48.6)
Male	126,756 (51.4)	126,756 (51.4)
Comorbidity
CAD	8,657 (3.51)	6,011 (2.44)	<0.001
Hypertension	26,628 (10.8)	13,128 (5.32)	<0.001
Diabetes	14,566 (5.91)	7,602 (3.08)	<0.001
Hyperlipidemia	6,080 (2.47)	3,815 (1.55)	<0.001
CVA	6,764 (2.74)	5,462 (2.22)	<0.001
Heart failure	2,837 (1.15)	1,845 (0.75)	<0.001
COPD	4,237 (1.72)	2,758 (1.12)	<0.001
CKD	2,056 (0.83)	834 (0.34)	<0.001
Alcohol-related diseases	2,250 (0.91)	1,282 (0.52)	<0.001
Cirrhosis	8,729 (3.54)	4,529 (1.84)	<0.001
Biliary stone	6,167 (2.50)	3,070 (1.25)	<0.001

Categorical data were examined using a chi-squared test;

^†continuous data were examined using a t-test.

CAD, coronary artery disease; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease; CVA, cerebrovascular disease; SD, standard deviation.