Table 3.

Association between allergic disease, adequate nights of sleep per week, and speech disorder in NSCH 2003/4 and 2007/8

		History of speech disorder
		No (n = 128,075)	Yes (n = 3555)
	Nights of adequate sleep per week	Freq	Freq	% Prevalence	Crude OR (95% CI)	p-value	Adjusted OR (95% CI)	p-value
Current asthma
No	4–7	105,686	2632	2.7 (2.5–2.9)	1.00	–	1.00	–
No	0–3	9652	296	3.9 (3.0–4.8)	1.50 (1.16–1.94)	0.002	1.76 (1.32–2.34)	0.0001
Yes	4–7	11,025	541	6.1 (5.0–7.2)	2.38 (1.93–2.92)	<0.0001	1.56 (1.22–1.983)	0.0003
Yes	0–3	2049	112	7.8 (4.4–11.2)	3.10 (1.92–5.01)	<0.0001	2.51 (1.64–3.88)	<0.0001
Hay fever
No	4–7	95,000	2275	2.7 (2.5–2.9)	1.00	–	1.00	–
No	0–3	8492	243	4.0 (2.9–5.1)	1.52 (1.13–2.04)	0.005	1.81 (1.33–2.48)	0.0002
Yes	4–7	21,862	902	4.4 (3.9–4.9)	1.67 (1.43–1.94)	<0.0001	1.29 (1.09–1.53)	0.003
Yes	0–3	2579	135	6.0 (4.3–7.7)	2.32 (1.70–3.18)	<0.0001	2.06 (1.46–2.91)	<0.0001
Food allergy
No	4–7	112,700	2881	2.8 (2.6–3.0)	1.00	–	1.00	–
No	0–3	10,541	328	4.1 (3.1–5.0)	1.50 (1.16–1.92)	0.002	1.76 (1.35–2.29)	<0.0001
Yes	4–7	4280	296	9.3 (6.9–11.6)	3.60 (2.69–4.81)	<0.0001	2.35 (1.61–3.43)	<0.0001
Yes	0–3	545	49	12.1 (6.7–17.6)	4.88 (2.92–8.14)	<0.0001	3.80 (2.13–6.79)	<0.0001

Binary logistic regression models were constructed with history of speech disorder as the dependent variable and the interaction between current asthma, hay fever, or food allergy and nights of adequate sleep per week (0–3/4–7) as the independent variable. Multivariate models were also constructed that additionally included history of eczema, sex, age, race, household income, highest level of household education, US vs. foreign birthplace, insurance coverage, and outpatient healthcare utilization in the past year (all categorical) as independent variables. Adjusted prevalence odds ratios and 95% confidence intervals were estimated. Bold values indicate P < 0.05.