Table 5.

Primary efficacy parameters during run-in period (four weeks) compared with average during treatment with lisinopril or placebo in 47 participants

	Mean (SD) in run in	Lisinopril			Placebo
		Mean (SD)	Mean % reduction v run-in (95% CI)		Mean (SD)	Mean % reduction v run- in (95% CI)
Hours with headache	65 (74)	43 (30)	34 (10 to 57)		54 (32)	17 (−1 to 35)
Days with headache	9.4 (4.0)	6.6 (4.0)	30 (19 to 42)		7.9 (3.0)	16 (4 to 28)
Days with migraine	6.8 (3.0)	4.8 (3.0)	29 (15 to 42)		6.2 (3.0)	9 (−3 to 21)