Table 2.

Sample Size, Dropout Rates, and Baseline Depression Severity in Six Studies that Compared Active Antidepressant Medications to Pill-Placebo

Study	N	Dropouts		Baseline HRSD Severity
		N	%	Mean	SD
Barrett et al. (2001)c
Placebo	39	8	21	14.38	3.98
Medication	38	13	34	14.05	2.86
Elkin et al. (1989)c
Placebo	62	17	27	19.47	4.60
Medication	57	13	23	19.51	4.62
DeRubeis el al. (2005)b
Placebo	60	9	15	23.47	2.73
Medication	120	13	11	23.22	2.70
Dimidjian et al. (2006)b
Placebo	45	4	9	20.76	4.59
Medication	82	15	18	20.73	3.94
Philipp et al. (1999)a
Placebo	46	3	7	22.20	4.15
Medication	105	3	3	22.70	4.03
Wichers et al. (2009)b,c
Placebo	32	5	16	23.72	2.81
Medication	32	9	28	24.38	3.84

Note. Studies with the same superscript do not differ with respect to mean rates of attrition at p < .05.