Table 1 Characteristics of the sample of adolescents from public and private schools (n = 862), Goiânia, Brazil, 2010–2011

 Public

596

69.1 (65.9–72.2)

-

-

 Private

266

30.9 (27.8–34.1)

-

-

 Male

407

47.2 (43.8–50.6)

280

47.0 (42.9–51.1)

127

52.3 (41.6–53.9)

0.835

 Female

455

52.8 (49.3–56.1)

316

53.0 (48.9–57.1)

139

47.7 (46.1–58.4)

 14–15

450

52.2 (48.8–55.5)

306

51.3 (47.2–55.4)

144

54.1 (47.9–60.2)

0.448

 16–18

412

47.8 (44.4–51.1)

290

48.7 (44.6–52.8)

122

45.9 (39.8–52.0)

 Non-white

420

48.8 (45.4–52.2)

316

53.2 (48.9–57.0)

104

39.1 (33.1–45.2)

<0.001*

 White

440

51.2 (47.7–54.5)

278

46.8 (42.6- 50.7)

162

60.9 (54.8–66.8)

 A - B

375

43.5 (40.1–46.8)

186

31.2 (27.5–35.0)

189

71.0 (65.2–76.4)

 C

453

52.5 (49.1–55.9)

378

63.4 (59.4–67.2)

75

28.2 (22.9–34.0)

<0.001*

 D – E

34

4.0 (2.74–5.46)

32

5.4 (3.7–7.5)

2

0.8 (0.1–2.7)

 No

848

98.4 (97.2–99.1)

584

98.0 (96.5–98.9)

264

99.3 (97.3–99.9)

0.176

 Yes

14

1.6 (0.89–2.71)

12

2.0 (1.0–3.5)

2

0.7 (0.1–2.7)

 No

240

27.8 (24.8–30.9)

179

30.0 (26.3–33.9)

61

22.9 (18.0–28.5)

0.032*

 Yes

622

72.2 (69.0–75.1)

417

70.0 (66.1–73.6)

205

77.1 (71.5–82.0)

 No

286

33.2 (30.0 - 36.4)

206

34.6 (30.7 - 38.5)

80

30.1 (24.6 - 36.0)

0.196

 Yes

576

66.8 (63.5 - 69.9)

390

65.4 (61.5 - 69.2)

186

69.9 (64.0 - 75.4)

 No

712

82.6 (79.8–85.0)

499

83.7 (80.5–86.6)

213

80.1 (74.8–84.7)

0.192

 Yes

150

17.4 (14.9–20.1)

97

16.3 (13.4–19.5)

53

19.9 (15.3–25.2)

 No

741

86.0 (83.4–88.2)

523

87.7 (84.8–90.2)

218

81.9 (76.8–86.3)

0.024*

 Yes

121

14.0 (11.7–16.5)

73

12.3 (9.7–15.1)

48

18.1 (13.6–23.2)

 No

682

79.1 (76.2–81.8)

484

81.2 (77.8–84.3)

198

74.4 (69.8–79.6)

0.024*

 Yes

180

20.9 (18.2–23.8)

112

18.8 (15.7–22.2)

68

25.6 (20.4–31.2)