Table 2.

Odds ratio^a for 2,5-dichlorophenol levels and asthma morbidity in wheezers, stratified by atopic^b status

Outcome	Atopicb wheezers (n=156)		Non-atopicb wheezers (n=94)
	Odds ratio (95% CI) c	p for trend	Odds ratio (95% CI)	p for trend
Asthma, diagnosed by a doctor d		<0.001		0.9
Lower tertile	1.0		1.0
Mid-tertile	2.9 (1.2, 7.2)		1.0 (0.3, 4.1)
Upper tertile	4.7 (1.8, 12.1)		1.0 (0.1, 9.8)
Medications for wheezingf		0.046		0.3
Lower tertile	1.0		1.0
Mid-tertile	1.5 (0.8, 3.0)		0.7 (0.2, 2.8)
Upper tertile	2.2 (0.9, 5.1)		2.9 (0.7, 12.4)
Missing work or school due to wheezing e		<0.001		0.9
Lower tertile	1.0		1.0
Mid-tertile	2.0 (0.6, 6.5)		0.7 (0.2, 2.6)
Upper tertile	10.0 (4.6, 21.6)		1.4 (0.3, 5.8)
Wheezing during exercise g		0.045		0.9
Lower tertile	1.0		1.0
Mid-tertile	6.1 (2.1, 18.0)		1.1 (0.3, 4.0)
Upper tertile	5.8 (0.97, 34.6)		0.8 (0.2, 3.4)

^aAll estimates are weighted to the sampling weights

^bAtopy was defined as the presence of allergen specific IgE ≥0.35 kU/L to at least one environmental and/ or food allergen

^c95% CI – 95% confidence interval

^dAsthma was defined by the answer to the question: “Has a doctor or other health professional ever told that (you have/s/he/survey participant (SP) has) asthma?”

^eDuring the past 12 months, did (you/ study participant) miss any days of work or school due to wheezing or whistling?

^fIn the past 12 months, (have you/ has study participant) taken medication, prescribed by a doctor, for wheezing or whistling?

^gIn the past 12 months has (your/ study participant’s) chest sounded wheezy during or after exercise or physical activity?

Results were adjusted for sample weights, urine creatinine, age, gender, race, and poverty-income ratio.

Values in bold are statistically significant.