Table 1.
Demographic characteristics of the population of the state of Piauí (Brazil) in 2010 and of patients with inflammatory bowel disease (total), Crohn’s disease, and ulcerative colitis according to gender, race, education, family income, and residence (urban or rural) in Piauí (Brazil), 1988-2012
| Demographic variables | General population of Piauí1: (n = 3118360) |
IBD phenotype |
|||
| CD (n = 100) | UC (n = 152) | Overall IBD (n = 252) | |||
| n (%) | n (%) | n (%) | |||
| Gender | Male | 49.0% | 54 (54.0) | 55 (36.2) | 109 (43.3) |
| Female | 51.0% | 46 (46.0) | 97 (63.8) | 143 (56.7) | |
| χ2 test | - | P = 0.32 | P = 0.00 | P = 0.07 | |
| Race | Miscegenated | 64.0% | 64 (64.0) | 107 (70.4) | 171 (67.9) |
| White | 24.4% | 26 (26.0) | 34 (22.4) | 60 (23.8) | |
| Black | 9.4% | 10 (10.0) | 10 (6.6) | 20 (7.9) | |
| Yellow | 2.2% | 0 (0) | 1 (0.6) | 1 (0.4) | |
| χ2 test | - | P = 0.50 | P = 0.24 | P = 0.18 | |
| Education (yr of schooling) | Uneducated and < 9 yr | 58.2%2 | 25 (25.0) | 70 (46.0) | 95 (37.8) |
| ≥ 9 yr | 41.8% | 75 (75.0) | 82 (53.9) | 157 (62.4) | |
| χ2 test | - | P = 0.00 | P = 0.00 | P = 0.00 | |
| Residence | Urban area | 65.8% | 93 (93.0) | 124 (81.6) | 217 (86.1) |
| Rural area | 34.2% | 7 (7.0) | 28 (18.4) | 35 (13.9) | |
| χ2 test | - | P = 0.00 | P = 0.00 | P = 0.00 | |
| Average income | Monthly3 | 247.00 USD | 643.50 USD | 555.40 USD | 590.40 USD |
1
Source: Brazilian Institute of Geography and Statistics (Instituto Brasileiro de Geografia e Estatística - IBGE [database online], 2010);
2
Individuals aged > 18 yr;
3
State of Piauí = income per capita, study population: family income. IBD: Inflammatory bowel disease; CD: Crohn’s disease; UC: Ulcerative colitis.