TABLE 4.

Multivariate model of risk factors independently associated with incident sleep disordered breathing in adolescence

	Snoring	AHI 2–<5 events per h	AHI ⩾5 events per h
Age	1.06 (0.91–1.22)	1.31 (1.13–1.53)	1.58 (1.28–1.97)
Change in BMI percentile %	1.00 (0.99–1.01)	1.02 (1.01–1.03)	1.05 (1.02–1.07)
BMI percentile# %	1.00 (0.99–1.01)	1.01 (1.00–1.03)	1.03 (1.01–1.04)
Ethnic minority	1.05 (0.54–2.07)	2.25 (1.18–4.29)	1.61 (0.64–4.10)
Female sex	0.65 (0.37–1.16)	0.28 (0.15–0.53)	0.14 (0.06–0.36)

Data are presented as OR (95% CI). A multinomial logistic regression model was used to identify those risk factors out of a larger subset of potential risk factors that were independently associated with incident sleep disordered breathing. This model was the result of entering all potential variables with p<0.40, excluding those variables assessing body fat composition in detail, and waist and neck circumference. AHI: apnoea–hypopnoea index; BMI: body mass index.

^#:baseline BMI percentile.