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Table 2 Associated factors regarding habitual snoring by univariate logistical regression models (N = 21,052)

From: Habitual Snoring in school-aged children: environmental and biological predictors

Variables Prevalence of habitual snoring
n (%)
Univariate regression models
   OR (95% CI) P value
Demographic characteristics
Age (years, mean ± SD)    .040
5-6 309 (12.6) 1.24 (1.14-1.47) .014
7- 491 (13.4) 1.33 (1.14-1.55) < .001
8- 462 (12.4) 1.22 (1.04-1.42) .013
9- 433 (11.8) 1.15 (0.98-1.34) .091
10- 408 (11.2) 1.09 (0.93-1.27) .309
11- 297 (10.4) 1.00  
Gender (%)    < .001
Boys 1437 (14.5) 1.62 (1.49-1.77)  
Girls 963 (9.5) 1.00  
Socioeconomic characteristics
Family income (%)    < .001
<800 671 (13.8) 1.36 (1.19-1.55) < .001
800-2500 1309 (11.6) 1.11 (0.99-1.25) .082
≥ 2500 401 (10.6) 1.00  
Mather's education level (%)    .409
Low 644 (11.7) 0.94 (0.85-1.05) .284
Medium 770 (11.6) 0.94 (0.85-1.04) .237
High 940 (12.3) 1.00  
Father's education level (%)    .548
Low 587 (12.4) 1.04 (0.93-1.16) .354
Medium 802 (11.7) 0.98 (0.88-1.08) .442
High 1008 (12.0) 1.00  
Chronic health problems
Obesity/overweight    < .001
Obesity 349 (16.2) 1.67 (1.15-1.66) < .001
Overweight 320 (15.4) 1.57 (1.37-1.81) < .001
Normal or under 1344 (10.4) 1.00  
Chronic or allergic rhinitis    < .001
Yes 421 (22.4) 2.35 (2.09-2.65)  
No 1990 (10.9) 1.00  
Asthma    < .001
Yes 138 (21.7) 2.10 (1.73-2.55)  
No 2274 (11.7) 1.00  
Adenotonsillar hypertrophy    < .001
Yes 498 (22.5) 2.43 (2.17-2.71)  
No 1914 (10.7) 1.00  
Chronic otitis media    < .001
Yes 141 (18.0) 1.65 (1.37-1.99)  
No 2270 (11.7) 1.00  
Food/drug allergy    < .001
Yes 174 (15.8) 1.41 (1.19-1.67)  
No 2237 (11.8) 1.00  
Environmental exposures
Delivery    < .001
Caesarean sectionh 906 (13.6) 1.25 (1.15-1.37)  
Vaginal Birth 1497 (11.2) 1.00  
Feeding patterns during the first four months    
Breasting feeding 1512 (11.4) 1.00 .001
Mixed/bottle feeding 896 (13.1) 1.16 (1.07-1.27)  
Breast feeding    
≥ 6 months 1230 (11.2) 1.00 < .001
< 6 months 1182 (12.9) 1.21 (1.08-1.56)  
Pregnancy maternal smoking    < .001
Yes 76 (19.5) 1.81 (1.41-2.33)  
No 2333 (11.8) 1.00  
Household passive smoking    < .001
Yes 668 (13.4) 1.19 (1.08-1.31)  
No 1735 (11.5) 1.00  
Family history of SDB
Habitual snoring    < .001
Yes 1060 (16.0) 1.72 (1.57-1.87)  
No 1352 (10.0) 1.00  
OSAS    < .001
Yes 93 (19.3) 1.79 (1.42-2.26)  
No 2319 (11.8) 1.00  
  1. Family income was expressed in RMB(yuan)/person/month
  2. OR: odds ratio; CI: confidence interval