Table 1.

Patient baseline characteristics by age

	< 45 years old	45 – 69 years old	≥70 years old	P value
Patients, No.	30,243	31,677	641
Age, mean (SD), years	35.9 (11.6)	54.7 (6.4)	72.4 (2.0)	<0.001
Age, median (IQRa), years	36.9 (31.7–41.0)	54.1 (49.3–59.4)	71.9 (70.8–73.5)	<0.001
Procedure Type (%)
Roux-en-Y Gastric Bypass	39.7	41.9	31.5	<0.001
Sleeve Gastrectomy	60.3	58.1	68.5	<0.001
Male (%)	18.4	24.3	34.0	<0.001
Starting BMIb (%)
<40	11.1	17.2	24.0	<0.001
40–49	49.0	50.3	52.7	0.002
50–59	29.6	25.1	20.8	<0.001
≥60	10.3	7.4	2.5	<0.001
Mean (SD)	49.0 (8.7)	47.3 (8.1)	45.1 (6.8)	<0.001
Race/ethnicity (%)
White, Non-Hispanic	71.5	80.2	91.7	<0.001
Black, Non-Hispanic	18.4	13.0	2.8	<0.001
Other or Multiracial	10.0	6.9	5.5	<0.001
Comorbidities (%)
Diabetes	23.4	44.2	57.7	<0.001
Hypertension	34.9	69.9	88.8	<0.001
Hyperlipidemia	34.2	62.4	81.1	<0.001
Obstructive Sleep Apnea	38.4	55.8	61.0	<0.001
CVDc	36.5	72.1	91.3	<0.001
CADd	1.7	9.6	25.4	<0.001
Serious Lung Disease	24.7	28.4	31.5	<0.001
Anticoagulation Use	0.1	0.1	0.3	0.005
Total Comorbidities, No. (SD)	3.8 (2.0)	5.3 (2.0)	6.1 (1.7)	<0.001

^aIQR; Inter-Quartile Range (25%−75%),

^bBMI; Body Mass Index (kg/m²),

^cCVD; cardiovascular disease,

^dCAD; coronary artery disease