Costa et al. BMC Public Health 2012, 12:73 http://www.biomedcentral.com/1471-2458/12/73 Page 4 of 8 Table 1 Bivariate analyses of the socio-demographic, biological characteristics and prenatal assistance data related to age group in pregnant adolescents assisted in Public Health Care Services. Variables Age group (years) Total p n(%) 12-14 Marital status (n = 320) Single 23(60.5) Married 15(39.5) Religion (n = 308) Yes 18(47.4) No 20(52.6) Racial classification (n = 320) Non-white 32(84.2) White 6(15.8) Studying (n = 320) Yes 21(55.3) No 17(44.7) Paid job (n = 320) Yes 1(2.6) No 37(97.4) Annual family income (US$) (n = 320) Less than 5436.00 20(52.6) More than 5436.00 18(47.4) People living with the pregnant adolescent (n = 320) Less than 4 22(57.9) More than 4 16(42.1) First pregnancy (n = 320) Yes 36(94.7) No 2(5.3) Living children (n = 50) 1 child 2(100.0) 2-3 children 0(-) Gestation period in the 1st consultation (n = 315) 1st trimester 20(55.6) 2nd -3rd trimester 16(44.4) First consultation (n = 320) Yes 23(60.5) No 15(39.5) Number of prenatal consultations (n = 320) Less than 2 27(71.1) More than 2 11(28.9) IgG serology for toxoplasmosis (n = 214) Positive 12(44.4) Negative 15(55.6) IgM serology for toxoplasmosis (n = 214) Positive 0(-) Negative 27(100.0) Fortaleza, Ceara. March 2009 to November 2010. (n = 320) *We used Fisher Exact Test 95%CI 44.5-75.0 25.0-55.5 32.0-63.1 36.9-68.0 70.0-93.3 6.7-30.0 39.4-70.4 29.6-60.6 0.1-12.3 87.7-99.9 36.8-68.0 31.9-63.1 41.9-72.7 27.3-58.1 83.7-99.1 0.9-16.3 22.3-0.0 - 39.2-71.0 28.9-60.8 44.5-75.0 24.9-55.5 55.2-83.7 16.2-44.7 26.8-63.2 36.7-73.2 - 87.2-0.0 n(%) 101(35.8) 181(64.2) 185(68.5) 85(31.5) 212(75.2) 70(24.8) 113(40.1) 169(59.9) 35(12.4) 247(87.6) 126(44.7) 156(55.3) 187(66.3) 95(33.7) 234(83.0) 48(17.0) 42(87.5) 6(12.5) 136(48.8) 143(51.2) 124(44.0) 158(56.0) 188(66.7) 94(33.3) 85(45.4) 102(54.6) 5(2.7) 182(97.3) 15-19 95%CI 30.4-41.5 58.5-69.6 59.9-70.9 25.0-35.7 69.9-79.9 20.0-30.1 34.5-45.9 54.1-65.5 8.9-16.7 83.4-91.0 38.9-50.5 49.5-61.0 60.6-71.7 28.4-39.4 78.3-87.0 12.9-21.8 75.8-94.8 5.2-24.2 42.9-54.6 45.4-57.1 38.2-49.8 50.2-61.7 38.2-49.8 28.0-39.0 38.4-52.6 47.4-61.6 0.9-6.1 93.9-99.1 n(%) 124(38.7) 196(61.3) 203(65.9) 105(34.1) 244(76.2) 76(23.8) 134(41.9) 186(58.1) 36(11.3) 284(88.7) 146(45.6) 174(54.4) 209(65.3) 111(34.7) 270(84.4) 50(15.6) 44(88.0) 6(12.0) 156(49.5) 159(50.5) 147(45.9) 173(54.1) 215(67.2) 105(32.8) 97(45.3) 117(54.7) 5(2.3) 209(97.7) 0.003 0.010 0.109 0.075 0.073 0.356 0.306 0.061 1.000* 0.220 0.055 0.589 0.921 0.506*