Table 3.

Associations between ethnicity and the top 5 phyla and top 10 genera

Taxa	Group effect p-value	Pairwise comparison	IRR	95% CI	Pairwise comparison p-value
Genus
Corynebacterium	0.0008	White vs other	0.27	0.12–0.59	0.001
		Asian vs other	0.17	0.049–0.63	0.0075
Brevundimonas	0.0051	White vs Asian	0.084	0.015–0.46	0.0042
Aeromonas	0.022	Asian vs other	0.020	0.0007–0.59	0.023

Ethnicity was investigated for all taxa and models were adjusted for DNA extraction and PCR sequencing batch effects. Statistically significant findings shown only (group effect: p ≤ 0.022 for phylum, p ≤ 0.017 for genus; pairwise comparison: p < 0.05). No statistically significant associations were found between ethnicity and any phylum-level taxa. Other: pooled South Asian, Black, other. Abbreviations: confidence interval, CI, incidence rate ratio, IRR