Table 1. Associations of β-glucuronidase and β-glucosidase mean activity levels with demographic and questionnaire data of 51 study volunteers.

	β-glucuronidasea			β-glucosidasea
Variable (units)	Beta	P-value		Beta	P-value
Gender (male = 0, female = 1)	0.32	0.22		0.20	0.22
Age (per year)	0.002	0.89		−0.01	0.09
Body mass index [BMI (per Kg/M2)]b	−0.03	0.49		−0.04	0.10
BMI category (<25 = 0, ≥25 = 1)	−0.05	0.81		−0.19	0.24
Weight gain (no change = 0, ≥5 lb = 1)	−0.12	0.73		−0.13	0.56
Weight loss (no change = 0, ≥5l b = 1)	0.85	0.03		0.28	0.26
Antibiotic use (<6 months = 1, else = 0)	−0.09	0.77		−0.19	0.30
Other prescription (<6 months = 1, else = 0)	0.04	0.89		−0.03	0.86
Food allergy (no = 0, yes = 1)	0.43	0.32		0.09	0.73
Vegetarian (no = 0, yes = 1)	−0.05	0.92		−0.56	0.06
Probiotic supplement use (n = 0, yes = 1)	−0.31	0.25		−0.26	0.13
Ever smoker (no = 0, yes = 1)	0.60	0.09		−0.04	0.84

^aBeta values estimate the increase in log_e of enzymatic activity (IU/100 mg fecal protein) per unit increase in the independent variable.

^bBMI models were adjusted for gender and age.