Table 1.

Characteristics of the population. Values are count (%)

	Unexposed	Exposed
Factor	n = 19,388	n = 4,043
Dead	1,879 (10)	351 (9)
Age
< 50	7,519 (39)	1,570 (39)
50–59	5,835 (30)	1,220 (30)
60–74	4,758 (25)	989 (25)
≥ 75	1,276 (7)	264 (7)
Female sex	12,488 (64)	2,600 (64)
CCI
0	18,263 (94)	3662 (91)
1–2	974 (5)	345 (9)
> 2	151 (1)	36 (1)
Income
1st quarter	4,945 (26)	1,062 (26)
2nd quarter	4,893 (25)	1,047 (26)
3rd quarter	4,869 (25)	987 (24)
4th quarter	4,667 (24)	943 (23)
Education
None	284 (2)	75 (2)
9 years	5,302 (27)	1,111 (28)
High school	8,387 (43)	1,824 (45)
University	5,415 (28)	1,033 (26)

CCI = Charlson’s Comorbidity Index