Table 3.

The factors associated with physician-diagnosed asthma and school absenteeism in 13–14-year-old students.

Variables	Adjusted analysis
	PR (95% CI)	P-value
Associated factors for physician-diagnosed asthma
Male	1.38 (1.05–1.83)	0.02
Maternal history of asthma	2.61 (1.69–4.02)	<0.01
Paracetamol usage in the past 12 months (at least once per month)	2.60 (1.24–5.42)	0.01
Associated factors for school absenteeism
Nocturnal cough	1.99 (1.16–3.41)	0.01
Current wheezing (wheezing in the past 12 months)	7.52 (4.39–12.9)	<0.01
Paracetamol usage in the past 12 months (at least once per month)	3.16 (1.10–9.06)	0.03
Paracetamol usage in the past 12 months (at least once per year)	2.19 (1.25–3.83)	<0.01

Adjusted analysis for physician-diagnosed asthma is adjusted by body matrix index, fast food intake, and parental histories with asthma, allergic rhinitis, and food allergy (the factors with p < 0.1 at unadjusted Poisson regression). Adjusted analysis for school absenteeism is adjusted by night wakening, speech-limiting wheezing, exercise-induced wheezing, frequent truck passage, cooked vegetable ingestion, current cat exposure, and current tobacco smoking (the factors with p < 0.1 at unadjusted Poisson regression)