Table 3.

Characteristics of cohort 1 (N = 3,794) and cohort 2 (N = 30,491) before propensity score matching

1:Surgery.2:CPAP	Cohort	Age and sex	Mean SD	Patients	% of Cohort	p-Value	Std. Diff
1	Age at index (years)	AI	35.3 ± 15.4	3,018	100%	< 0.001	1.602
2			58.4 ± 13.4	30,409	100%
1	Female	F		1,170	38.80%	< 0.001	0.090
2				13,139	43.20%
1	Male	M		1,847	61.20%	< 0.001	0.090
2				17,269	56.80%
Diagnosis
ICD Code	Diseases		Patients	% of Cohort	p-Value	Std. Diff
1	E65–E68	Overweight, obesity, and other hyperalimentation		542	18.00%	< 0.001	0.354
2				10,082	33.20%
1	G00–G99	Diseases of the nervous system		1,791	59.30%	< 0.001	0.173
2				15,435	50.80%
1	I60–I69	Cerebrovascular diseases		55	1.80%	< 0.001	0.322
2				2,739	9.00%
1	I30–I5A	Other forms of heart disease		236	7.80%	< 0.001	0.743
2				11,203	36.80%
1	I20–I25	Ischemic heart diseases		73	2.40%	< 0.001	0.642
2				6,895	22.70%
1	I95–I99	Other and unspecified disorders of the circulatory system		52	1.70%	< 0.001	0.336
2				2,822	9.30%
1	I80–I89	Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified		68	2.30%	< 0.001	0.359
2				3,368	11.10%
1	I70–I79	Diseases of arteries, arterioles, and capillaries		31	1.00%	< 0.001	0.441
2				3,483	11.50%
1	I26–I28	Pulmonary heart disease and diseases of pulmonary circulation		29	1.00%	< 0.001	0.441
2				3,431	11.30%
1	I05–I09	Chronic rheumatic heart diseases		17	0.60%	< 0.001	0.248
2				1,331	4.40%
1	I00–I02	Acute rheumatic fever		10	0.30%	< 0.001	0.066
2				14	0.00%
1	I10–I16	Hypertensive diseases		497	16.50%	< 0.001	0.752
2				15,070	49.60%
1	K00–K95	Diseases of the digestive system		878	29.10%	< 0.001	0.186
2				11,502	37.80%

SD Standard deviation, Std. Diff