Table 1.

Characteristics of Cohort

Characteristics	RYGB Patients (n = 28,204)	Nonobese Population Controls (n = 55,903)	Nonoperated Obese Patients (n = 40,827)	Nonobese Population Controls (n = 80,800)
Age, y, mean (SD)	40.8 (10.4)	40.8 (10.4)	43.1 (11.8)	43.1 (11.7)
Sex, no. (%)
Women	21,295 (75.5)	42,203 (75.5)	27,983 (68.5)	55,460 (68.6)
Outpatient, No (%)	20,829 (92.3)	–	33,737 (95.4)	–
Comorbidity, no. (%)
Hypertension	6731 (23.9)	1853 (3.3)	9540 (23.4)	3392 (4.2)
Diabetes mellitus	4151 (14.7)	954 (1.7)	6600 (16.2)	1689 (2.1)
Sleep apnoea	3459 (12.3)	518 (0.9)	6085 (14.9)	756 (0.9)
Coronary heart disease	806 (2.9)	568 (1.0)	2411 (5.9)	1383 (1.7)
Malignancy	759 (2.7)	1734 (3.1)	1900 (4.7)	3063 (3.8)
Ischemic stroke*	233 (0.8)	228 (0.4)	593 (1.5)	470 (0.6)
Myocardial infarction*	351 (1.2)	231 (0.4)	987 (2.4)	644 (0.8)
Marital status†, no. (%)
Single	11,652 (41.3)	23,872 (42.7)	15,643 (38.3)	31,263 (38.7)
Married/cohabiting	12,011 (42.6)	24,348 (43.6)	17,563 (43.0)	36,791 (45.5)
Divorced/widowed	4292 (15.2)	7179 (12.8)	7031 (17.2)	11,592 (14.3)
Country of birth, no. (%)
Sweden	23,771 (84.3)	44,910 (80.3)	32,823 (80.4)	65,487 (81.0)
Education level‡, no. (%)
≤9 y	4859 (17.2)	6574 (11.8)	8432 (20.7)	11,654 (14.4)
10–12 y	17,327 (61.4)	25,354 (45.4)	22,002 (53.9)	36,876 (45.6)
>12y	5896 (20.9)	23,160 (41.4)	9987 (24.5)	31,157 (38.6)

Characteristics were derived at the study baseline, 2 years after obesity diagnosis for RYGB patients and nonoperated obese. Populations controls (matched for age, sex, and county of residence) were assigned the same start date as their matched case.

^*All individuals with a history of ischemic stroke or myocardial infarction at study baseline were excluded.

^†Missing data of marital status for 2497 (1.2%) individuals.

^‡Missing data of education level for 2456 (1.2%) individuals.