Table 1.
Population descriptive
| Otitis media 12–24 months of age | |||||
|---|---|---|---|---|---|
| n = 5,323 | No n = 2,808 (52.8%) |
Yes n = 2,515 (47.2%) |
OR | aOR | |
| Birthweight | 3,438 (574) | 3,422 (577) | 3,456 (570) | 1.11* (1.01–1.22) | 1.07 (0.84–1.37) |
| Gestational age | 40.0 (25.3–43.4) | 40.0 (25.3–43.3) | 40.1 (27.1–43.4) | 1.02 (0.99–1.05) | 1.04 (0.97–1.12) |
| Gender | |||||
| Male (ref) | 2,643 (49.7) | 48.4% | 51.0% | ||
| Female | 2,680 (50.3) | 51.6% | 49.0% | 0.90 (0.81–1.00) | 0.89 (0.72–1.11) |
| Smoking | |||||
| No (ref) | 3,110 (84.9) | 85.1% | 84.6% | ||
| Yes | 554 (1. 15) | 14.9% | 15.4% | 1.04 (0.87–1.25) | 1.16 (0.86–1.55) |
| Siblings | |||||
| No (ref) | 2,159 (58.9) | 62.9% | 54.1% | ||
| Yes | 1,508 (41.1) | 37.1% | 45.9% | 1.44*** (1.26–1.65) | 1.42* (1.13–1.79) |
| Educational level mother | |||||
| Low | 292 (5.8) | 4.7% | 7.0% | ||
| Middle | 1,911 (37.8) | 37.3% | 38.4% | 0.69** (0.54–0.88) | 0.84 (0.36–1.95) |
| High | 2,851 (56.4) | 58.1% | 54.5% | 0.62*** (0.49–0.80) | 1.03 (0.44–2.40) |
| Day care | |||||
| No (ref) | 730 (22.3) | 21.3% | 23.5% | ||
| Yes | 2,543 (77.7) | 78.7% | 76.5% | 0.88 (0.75–1.04) | 0.86 (0.66–1.13) |
| Breastfeeding | |||||
| Never (ref) | 450 (19.0) | 17.7% | 20.4% | ||
| Less than 3 months | 1,031 (43.5) | 46.3% | 40.3% | 0.76* (0.61–0.95) | 0.86 (0.63–1.16) |
| More than 3 months | 890 (37.5) | 36.0% | 39.3% | 0.95 (0.76–1.19) | 1.14 (0.83–1.55) |
| Pacifier use | |||||
| No (ref) | 1,242 (34.4) | 34.5% | 34.4% | ||
| Yes | 2,364 (65.6) | 65.5% | 65.6% | 1.01 (0.88–1.16) | 0.95 (0.75–1.20) |
| Otitis from 0 to 6 months | |||||
| No (ref) | 3,309 (91.9) | 94.7% | 88.5% | ||
| Yes | 292 (8.1) | 5.3% | 11.5% | 2.34*** (1.82–3.00) | 1.83** (1.24–2.71) |
| Otitis from 6 to 12 months | |||||
| No (ref) | 2,808 (52.8) | 67.4% | 45.8% | ||
| Yes | 2,515 (47.2) | 32.6% | 54.2% | 2.44*** (2.16–2.76) | 2.72*** (2.18–3.38) |
Values of birth weight is mean (standard deviation), gestational age is median (range). Other values are absolute numbers (percentages). Data were missing on birth weight (n = 8), gestational age (n = 1), maternal smoking (n = 1,659), siblings (n = 1,656), educational level of mother (n = 269), day care attendance (n = 2,050), breast feeding (n = 2,952), pacifier use (n = 1,717), otitis from 0 to 6 months (n = 1,722) and otitis from 6 to 12 months (n = 815). No data was missing on gender. OR univariate model, aOR full model. Birthweight entered in analyses in Kg. * P < 0.05, ** P < 0.01, *** P < 0.001