Table 1.

Risk of complications of hypertension according to the COC level

COC level	No of patients	No of events	IR per 1000 PYR	HR* (95% CI)	P value
High	52 179	7143	15.4	Ref
Low	50 340	8142	17.7	1.14 (1.10 to 1.17)†	<0.001

*Adjusted for sex, age, insurance type, income, number of visits, number of providers, level of hospital and comorbidities

†p<0.001.

COC, continuity of care; IR, incidence rate; PYR, person-years at risk.