Table 2.

Characteristics of Web portal registrants who access the site at least 2 times compared with non-registrants and registrants who used the site minimally.

Characteristics		Portal registrants (N=1015): Non-users (≤1 session)		Portal registrants (N=2282): Active users (≥2 sessions)		Portal non-registrants (N=1649): Matched controls
		n	%	n	%	n	%
Sex
	Female	459	45.22	974	42.68	717	43.48
	Male	556	54.78	1308	57.32	932	56.52
Age a
	<44	103	10.15	237	10.39	190	11.52
	45-54	202	19.90	472	20.68	318	19.28
	55-64	295	29.06	755	33.09	488	29.59
	65-74	221	21.77	525	23.01	389	23.59
	75-84	149	14.68	249	10.91	215	13.04
	85+	45	4.43	44	1.93	49	2.97
Chronic disease
	Diabetes only	433	42.66	1071	46.93	748	45.36
	Cardiovascular only	311	30.64	637	27.91	470	28.50
	Heart failure only	48	4.73	66	2.89	63	3.82
	≥2 chronic conditions	223	21.97	508	22.26	368	22.32
Mean Body Mass Index		31.36		31.34		32.4

^a P<.01.