Epidemiology of upper gastrointestinal symptoms in Brazil (EpiGastro): A population-based study according to sex and age group

Table 1 Distribution (%) of the study sample and the population of São Paulo according to age, gender, and educational level

Characteristic	Study population	São Paulo population
Age, yr
18-29	26.50	25.71
30-39	21.88	22.22
40-49	19.61	20.25
50-59	16.91	15.15
≥ 60	15.11	16.67
Gender
Male	40.35	46.93
Female	59.65	53.07
Educational level, yr
≤ 8	36.02	42.88
9-11	41.64	35.41
≥ 12	22.34	21.71