Table 4.

Abundance and prevalence of the major PCA determinants stratified by gender

Bacterial family	Abundance (Mean% ± SD)			Prevalence (%)
	Female (n = 325)	Male (n = 191)	Significance	Female (n = 325)	Male (n = 191)	Significance
Bacteroidaceae	33.2 ± 18.5	32.9 ± 19.7	NS	100	100	NS
Lachnospiraceae	18.0 ± 10.4	17.0 ± 9.5	NS	100	100	NS
Prevotellaceae	9.7 ± 17.7	16.6 ± 22.6	**	71.1	77.0	NS
Ruminococcaceae	17.9 ± 8.7	12.4 ± 9.2	**	100	100	NS

NS: P ≥ 0.05, **: P < 0.01