Table 1.

Distributions (counts and percentages) of characteristics observed in the Group Health EHR for N=8,345 patients satisfying inclusion/exclusion criteria, for n*=2,109 patients invited to participate in the survey and for n=1,153 patients who complete the survey. Also shown are the estimated distributions (percentages) for the N=8,345 patients in the full sample, based on re-weighting the observed distributions for the n=1,153 survey respondents to account for survey invitation and response.

	Observed information in the EHR						Estimated distribution for all N=8,345 patients
	Full sample		Invited to participate		Survey respondents
	N	%	n*	%	n	%	%
Total	8,345		2,109		1,153
Female	5,823	70	1,398	66	790	69	72
Age, years
<= 35	1,570	19	430	20	175	15	22
(35, 40]	760	9	190	9	98	9	8
(40, 45]	833	10	213	10	100	9	12
(45, 50]	1,065	13	275	13	142	12	11
(50, 55]	1,261	15	305	14	187	16	14
> 55	2,856	34	696	33	451	39	33
Diagnosis
Major depressive episode - single	1,817	22	416	20	215	19	26
Major depressive episode - recurrent	2,534	30	641	30	343	30	28
Dysthymia	672	8	204	10	114	10	10
Depression NOS	3,322	40	848	40	481	41	36
Anxiety disorder	2,880	35	714	34	353	31	34
Sleep disorder	698	8	131	6	81	7	8
Smoker in the prior 9 months	1,491	18	322	15	134	12	20
Treatment type
Psychotherapy	1,485	18	566	27	317	28	17
Mirtazipine/Paroxetine	363	4	202	10	116	10	4
Buproprion/Fluoxetine	2,837	34	688	33	367	32	33
Other	3,660	44	653	31	353	30	46
Weight information in the EHR
Complete BL and FU	5,630	67	337	16	197	17	70
BL missing w/visit	623	8	518	25	273	24	7
BL missing w/o visit	1,271	15	741	35	402	35	14
BL complete & FU missing w visit	77	1	76	4	41	4	1
BL complete & FU missing w/o visit	744	9	437	21	240	21	8