Table 1.

Final multivariable logistic regression model showing the association between potential determinants and the presence of Methanobrevibacter smithii.

M. smithii presence
Adjusted main effects model (N = 419)a
Determinant	OR (CI95%)	FDR crit.b	p-value
Regular intake of organic milkc,d
No	Ref.
Yes	5.58 (1.83; 17.01)	0.006	0.003f
Regular intake of organic yogurtc,d
No	Ref.
Yes	4.25 (1.51; 11.95)	0.006	0.006
Diet of childe
Conventional (≤ 25% organic)	Ref.
Organic (incl. biodynamic; >25% organic)	0.36 (0.17; 0.79)	0.011	0.010f
Fiber intake (g)e	0.95 (0.88; 1.03)	0.028	0.250

^aModel adjusted for: age at fecal sampling (years), gender (male/female), recruitment group (conventional/alternative), total energy intake (kcal), and BMI (z-score).

^bCritical FDR cut-off level as determined by Benjamini-Hochberg procedure.

^cMissing value category omitted (included in FDR correction).

^dDue to multicollinearity both regular intake of organic milk and regular intake of organic yogurt were included in separate models, which included all other variables as listed in this table.

^eParameter estimates presented for the model containing organic milk intake. Parameter estimates did not change substantially when the variable “organic milk intake” was replaced by the variable “organic yogurt intake” (data not shown).

^fSignificant association after correction for FDR by Benjamini-Hochberg procedure, also indicated in bold.