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

From: Sedentary lifestyle and its associated factors among adolescents from public and private schools of a Brazilian state capital

Variable Total sample Public School Private School p a
  n % (95% CI) n % (95% CI) n % (95% CI)  
School type
 Public 596 69.1 (65.9–72.2)   -   -  
 Private 266 30.9 (27.8–34.1)   -   -  
Gender
 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)  
Age (years)
 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)  
Skin colourb
 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)  
Socioeconomic classification
 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)  
Tobacco use
 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)  
Alcohol consumption
 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)  
Sedentary lifestyle
 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)  
Altered BPc
 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)  
Altered WCd
 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)  
Overweight
 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)  
  1. aPearson’s chi-squared test; bTwo individuals did not respond; cBlood pressure; dWaist circumference
  2. *Statistically significant at p < 0.05
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