Association of bariatric surgery with risk of acute care use for hypertension-related disease in obese adults: population-based self-controlled case series study

Table 2 Number of patients and risk of acute care use for hypertension-related disease

Time interval and outcome	Number of patients	Risk, % (95% CI)	aOR (95% CI)^a	P value
	(n = 980)
13–24 months before bariatric surgery
ED visit or hospitalization^b	174	17.8 (15.4–20.2)	Reference	–
ED visit^c	130	13.3 (11.1–15.4)	Reference	–
Hospitalization^d	44	4.5 (3.2–5.8)	Reference	–
1–12 months before bariatric surgery
ED visit or hospitalization^b	178	18.2 (15.7–20.6)	1.02 (0.83–1.27)	0.83
ED visit^c	130	13.3 (11.1–15.4)	1.00 (0.78–1.28)	0.99
Hospitalization^d	50	5.1 (3.7–6.5)	1.14 (0.76–1.73)	0.53
0–12 months after bariatric surgery
ED visit or hospitalization^b	103	10.5 (8.6–12.4)	0.58 (0.45–0.74)	<0.0001
ED visit^c	91	9.3 (7.5–11.1)	0.69 (0.53–0.91)	0.008
Hospitalization^d	14	1.4 (0.7–2.2)	0.31 (0.17–0.57)	<0.0001
13–24 months after bariatric surgery
ED visit or hospitalization^b	126	12.9 (10.8–15.0)	0.71 (0.57–0.90)	0.005
ED visit^c	100	10.2 (8.3–12.1)	0.76 (0.58–0.99)	0.04
Hospitalization^d	30	3.1 (2.0–4.1)	0.68 (0.42–1.08)	0.10

CI confidence interval, aOR adjusted odds ratio, ED emergency department
^aAdjusted odds ratios are for each 12-month period versus the reference period (i.e., 13–24 months before the index bariatric surgery), as calculated with conditional logistic regression
^bAt least one acute care use (ED visit or unplanned hospitalization) for HTN-related disease
^cAt least one ED visit for HTN-related disease, not resulting in hospitalization
^dAt least one unplanned hospitalization for HTN-related disease