Table 2.

Adjusted ORs (95% CIs) for withdrawal from HTTx in coastal areas

	Inland area (n = 5860)	Coastal areaa (n = 3358)
No. of participants under HTTx	5666	3212
No. of participants withdrawal from HTTx	194	146
Percentage of participants withdrawal from HTTx	3.3	4.3
Model 1: Crude OR (95% CI)	1.00 (Ref.)	1.33 (1.07–1.65)
p value		0.011
Model 2: Adjusted OR (95% CI)	1.00 (Ref.)	1.44 (1.13–1.83)
p value		0.003
Model 3: Adjusted OR (95% CI)	1.00 (Ref.)	1.46 (1.14–1.86)
p value		0.003

Model 1: unadjusted; Model 2: adjusted for age, sex, and fiscal year of survey participation; Model 3: adjusted for age, sex, fiscal year of survey participation, smoking status, drinking status, having psychological distress, social network status, educational background, having a spouse, having children, living with family, ever been diagnosed with diabetes, ever been diagnosed with dyslipidemia, employment status, and estimated daily salt intake

CI confidence interval, OR odds ratio, HTTx treatment for hypertension

^aOdds ratios and 95% confidence intervals and p values for withdrawal from HTTx for the entire coastal area compared to those of the inland area are shown