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. 2019 Jul 18;37(4):406–413. doi: 10.1590/1984-0462/;2019;37;4;00002

Table 1. Prevalence and respective 95% confidence intervals of clinical and epidemiological characteristics of 9th grade students in the study, National School Health Survey of 2012.

Characteristics n % 95%CI
Socioeconomic/demographic
Macro-region North 108,350 8.0 7.5-8.4
Northeast 25.3 23.7-27.1
Mid-West 7.9 6.7-9.2
Southwest 44.3 41.6-47.0
South 14.6 13.4-15.8
School Public 108,350 82.8 77.8-86.9
Private 17.2 13.1-22.2
Child’s sex Female 108,350 52.2 50.2-54.3
Male 47.8 45.7-49.8
Child’s ethnicity Others 108,296 63.2 57.8-68.3
White-Caucasian 36.8 31.7-42.2
Child’s age ≤14 years 108,350 68.5 59.4-76.4
>14 years 31.5 23.6-40.6
Living with parents No 108,191 37.8 35.9-39.8
Yes 62.2 60.2-64.2
Mother’s education No study 90,035 10.0 8.4-12.0
Study 90.0 83.0-91.6
Father’s education No study 83,539 15.2 13.1-17.4
Study 84.8 82.6-86.9
Eating habits
Intake of fresh food in the past 7 days <5 days 107,792 82.1 80.9-83.3
≥5 days 17.9 16.7-19.1
Intake of ultra-processed food in the past 7 days >2 107,792 64.4 63.0-65.8
≤2 35.6 34.2-37.0
Lunch time or dinner time in the presence of parents or guardians in the past week ≤4 days 108,281 28.5 26.5-30.5
>4 days 71.5 69.5-73.5
Meals in front of the TV or while studying Yes 108,221 81.2 78.7-83.4
No 18.8 16.6-21.3
Breakfast in the past week ≤4 days 108,251 38.1 35.8-40.5
>4 days 61.9 59.5-64.2
Drug use history
Cigarette Yes 108,329 19.6 17.1-22.3
No 80.4 77.7-82.9
Alcohol Yes 108,350 66.6 64.0-69.2
No 33.4 30.8-36.0
Illicit drugs Yes 108,327 7.0 5.3-9.4
No 93.0 90.6-97.7
Respiratory problems
History of asthma* Yes 108,115 12.4 11.4-13.5
No 87.6 86.5-88.6
Health service history
Has sought health care service in the last 12 months Yes 108,227 48.2 46.1-50.2
No 51.8 49.8-53.9

95%CI: 95% confidence interval; *diagnosis by a physician at some point in their life.