Table 3.

Associations between antihypertensive medication prescription at discharge with incidence of readmission within 6 weeks

Antihypertensive medication at discharge	n	Percent readmitted	Unadjusted hazard ratio (95%CI)	Adjusted hazard ratio (95%CI)
No antihypertensive medication	49295	2.5	Reference	Reference
Labetalol only	4288	7.6	3.14 (2.78, 3.55)	1.63 (1.41, 1.88)
Nifedipine only	2426	3.6	1.45 (1.17, 1.80)	0.74 (0.59, 0.93)
Two or more antihypertensive medications	1245	3.2	1.28 (0.94, 1.76)	0.53 (0.38, 0.74)

Models adjusted for hypertensive diagnosis, last systolic and diastolic blood pressure, age, pre-pregnancy BMI, mode of delivery, insurance type, race/ethnicity, facility, smoking, preterm delivery, parity, neighborhood deprivation index, delivery year, and COPS2 score at admission.