Fig. 1

Results of multi regression analyses a. a Stepwise method was used. b Non-smoker: 0, smoker: 1. c Urinary concentrations were used as SG-adjusted and log-transformed values. d Values which were less than LOD value replaced the value of half of LOD. e Less than 1 cup of coffee/ week: 0, more than 1 cup of coffee/ week: 1. f Less than once of fruit consumption/ week: 0, more than once of fruit consumption: 1. g MnBP was an abbreviation for mono-n-butyl phthalate (a metabolite of di-n-butyl phthalate). h 3-PBA was an abbreviation for 3-phenoxybenzoate acid (a main metabolite of pyrethroid). i Less than LOD of urinary equol concentrations: 0, more than LOD of urinary equol concentrations: 1. * p < 0.05, ** p < 0.01 and *** p < 0.001