Table 1.

Sample stratification for age, education, and sex

Education	Age (M/F)
	35 ≤	36–50	51–65	66–75	76–80	≥ 86	Total
5 ≤	0/0	0/0	0/1	2/6	5/11	0/2	7/20
6–8	1/1	2/12	13/18	4/7	3/6	1/0	24/44
9–13	17/7	7/21	33/42	6/4	2/3	1/0	66/77
14–16	6/8	2/5	1/4	0/0	2/0	0/0	11/17
≥ 17	11/18	7/7	19/29	1/3	1/3	0/0	39/60
Total	35/34	18/45	66/94	13/20	13/23	2/2	147/218

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