Table 1.

Participant Demographics, overall, and by anastomosis test

Characteristic	Total (N=4444)		Patients without anastomosis test (N=636)		Patients with anastomosis test (N=3803)		p value
	n	%	n	%	n	%
Surgery performed							<.0001
Laparoscopic Gastric Bypass	3841	86.4	379	59.6	3458	90.9
Open Gastric Bypass	603	13.6	257	40.4	345	9.1
Patient Age (years), range	18.0–75.0		18.0–75.0		18.0–73.0		0.057
Median (Q1, Q3)		45.0(36.0,53.0)		44.0(35.5, 52.0)		45.0(36.0, 53.0)
Age (years)							0.04
<30	431	9.7	81	12.7	349	9.2
30–39	1126	25.3	164	25.8	962	25.3
40–49	1302	29.3	187	29.4	1113	29.3
50–59	1179	26.5	152	23.9	1025	27.0
60+	406	9.1	52	8.2	354	9.3
BMI (kg/m2), range	17.8–107.4		17.8–79.7		19.2–107.4		0.006
Median (Q1, Q3)		46.9(42.6,52.6)		48.1(43.1,53.6)		46.8(42.5,52.4)
BMI (kg/m2)							0.053
<35	66	1.5	6	0.9	58	1.5
35–<40	462	10.4	54	8.5	407	10.7
40–<50	2346	52.8	321	50.5	2024	53.2
50–<60	1174	26.4	191	30.0	982	25.8
60+	396	8.9	64	10.1	332	8.7
Male							0.04
No	3574	80.4	493	77.5	3078	80.9
Yes	870	19.6	143	22.5	725	19.1
White/Caucasian (41 missing)							<.0001
No	509	11.6	40	6.3	468	12.4
Yes	3894	88.4	594	93.7	3296	87.6
Hispanic (2 missing)							<.0001
No	4186	94.2	623	98.1	3558	93.6
Yes	256	5.8	12	1.9	244	6.4
Current or recent smoker (13 missing)							<.0001
No	3766	85.0	503	79.2	3258	85.9
Yes	665	15.0	132	20.8	533	14.1