Table 3.

Weighted odds ratios (95% confidence intervals) for daytime sleepiness across quartiles of pyridoxal 5′-phosphate (PLP) concentrations stratified by gender (NHANES 2005–2008).

	Model 2 a
	Males	Females
Q1 (<27.3)	1.00 (ref)	1.00 (ref)
Q2 (27.3 to <44.0)	0.68 (0.46–1.02)	0.81 (0.58–1.13)
Q3 (44.0 to <76.3)	0.72 (0.53–0.97) *	0.82 (0.58–1.16)
Q4 (≥76.3)	0.65 (0.45–0.93) *	0.95 (0.70–1.30)

Calculated using binary logistic regression models. ^a Model 2 adjusted for age, sex, race/ethnicity, education level, household poverty ratio, marital status, body mass index, physical activity, smoking status, caffeine intake, energy, alcohol consumption, hypertension, diabetes, depressive symptoms, and sampling season. * p < 0.05.