Table 1

Characteristics of the study population
Cases Controls
N % N %
Number 279 510 100 %
Controls (normal cytology) - 510
CIN2 150 53.7 -
CIN3 129 46.3 -
Mean age 32 years 32 years
Range 15-47 15-47
Education level
Elementary school 164 58.8 262 51.4
Middle school 93 33.3 159 31.2
High school 8 2.9 18 3.5
Missing 14 5.0 71 13.9
Ethnic group
Euro-Descendent 90 32.3 239 46.9
Afro-Descendent 7 2.5 24 4.7
Brazilian Mixed* 162 58.1 180 35.3
Asian 1 0.4 1 0.2
Missing 19 6.8 66 12.9
Age at first sexual intercourse 16 years 17 years
Lifetime number of sexual partners
1 42 15.0 156 30.6
2-10 208 74.6 275 53.9
>10 27 9.7 79 15.5
Missing 2 0.7 0 0
Number of full-term pregnancies 2 2
Range 0-18 0-27
Smoking status
Never smoker 130 46.6 277 54.3
Former smoker 51 18.3 148 29.0
Number of cigarettes/day (mean) 7 8
Current smoker 96 34.4 81 15.9
Number of cigarettes/day (mean) 7 8
Missing 2 0.7 4 0.8

*Brazilian Mixed: Mixed ethnicity with Euro-Descendent (mostly), Afro-Descendent, Amerindian and East Asian.

Gillio-Tos et al.

Gillio-Tos et al. BMC Cancer 2012 12:618   doi:10.1186/1471-2407-12-618

Open Data