Table 1.

Sample stratification for age, education, and sex

	Age (M/F)
Education	35 ≤	36–45	46–55	56–65	66–75	76–80	≥ 81	Total
5 ≤	0/0	0/0	0/1	0/0	2/6	1/8	3/4	6/19
6–8	1/1	0/6	5/13	10/11	4/7	1/4	3/1	24/43
9–13	17/7	2/6	21/33	17/24	6/4	2/3	0/0	65/77
14–18	6/8	2/1	0/6	1/2	0/0	0/0	0/0	9/17
≥ 19	11/18	3/4	12/17	11/15	1/3	1/2	0/1	39/60
Total	35/34	7/17	38/70	39/52	13/20	5/17	6/6	143/216

Cells show male/female (M/F) ratio for each co-occurrence