A Patient-Centered Electronic Tool for Weight Loss Outcomes after Roux-en-Y Gastric Bypass

Table 1

Demographic characteristics of primary study cohort by length of follow-up and of the validation cohort.

		Primary cohort				Validation cohort; 𝑁=378
		Total; 𝑁=2608	>6-month follow-up; 𝑁=2307	>12-month follow-up; 𝑁=2013	>24-month follow-up; 𝑁=1381
Age	Mean (SD)	45.8 (11.2)	46.1 (11.1)	46.4 (11.1)	46.8 (10.9)	46.3 (11.0)
	Range	[18, 74]	[18, 74]	[18, 74]	[18, 72]	[19, 72]
Gender	Female, % (N)	81% (𝑛=2102)	81% (𝑛=1866)	81% (𝑛=1638)	82% (𝑛=1354)	78% (𝑛=293)
	Male, % (N)	19% (𝑛=506)	19% (𝑛=441)	19% (𝑛=375)	18% (𝑛=242)	22% (𝑛=85)
Race	Caucasian, % (N)	97% (𝑛=2534)	95% (𝑛=2243)	97% (𝑛=1961)	98% (𝑛=1354)	97% (𝑛=367)
	Black, % (N)	2% (𝑛=59)	2% (𝑛=50)	2% (𝑛=41)	2% (𝑛=22)	2% (𝑛=6)
	Other, % (N)	1% (𝑛=15)	1% (𝑛=14)	1% (𝑛=11)	<1% (𝑛=5)	1% (𝑛=5)
BMI	Mean (SD)	49.5 (8.7)	49.5 (8.8)	49.6 (8.7)	49.4 (8.6)	49.7 (8.2)
	Range	[35.0, 94.3]	[35.0, 94.3]	[35.0, 94.3]	[35.0, 94.3]	[35.5, 77.8]