Table 1.

Comparison of responders to non-responders

Subgroup	Eligible	Responders	%	Nonresponders	%	p-value
Sex
male	332	141	42.47	191	57.53	0.129
female	53	29	54.72	24	45.28
Graduation
≤ 1979	134	54	40.30	80	59.70	0.114
1980–1989	114	60	52.63	54	47.37
≥ 1990	137	56	40.88	81	59.12
Setting
academic	112	59	52.68	53	47.32	0.024
community	273	111	40.66	162	59.34
Health region
1	19	7	36.84	12	63.16	0.022
2	37	18	48.65	19	51.35
3	14	10	71.43	4	28.57
4	50	21	42.00	29	58.00
5	9	7	77.78	2	22.22
6	29	11	37.93	18	62.07
7	61	33	54.10	28	45.90
8	26	12	46.15	14	53.85
9	39	21	53.85	18	46.15
10	17	8	47.06	9	52.94
11	31	5	16.13	26	83.87
12	15	5	33.33	10	66.67
13	27	9	33.33	18	66.67
14	11	3	27.27	8	72.73
Total	385	170		215