Table 2. Antibiotic prescriptions in respiratory tract infection episodes, showing rates for pregnant and non-pregnant patients, and proportion of non-penicillin V prescriptions for the same groups

		n (%)	aOR	cRR (95% CI)
Patients with a pregnancy in study period (n = 18 890)
Antibiotic prescription	Control	5116 (34.2)	Ref
Antibiotic prescription	Pregnant	1015 (25.9)	0.66	0.74 (0.68 to 0.81)
Non-penicillin V prescriptions	Control	2285 (44.7)	Ref
Non-penicillin V prescriptions	Pregnant	364 (35.9)	0.53	0.67 (0.59 to 0.77)

aOR = adjusted odds ratio. 95% CI = 95% confidence interval. cRR = calculated relative risk. Ref = reference.