Table 2.

Linearly affected major classified taxa by age grouping.

Taxa 1	Location	10–29 Years	30–49 Years	50–79 Years	SEM 2	Linear	Quadratic
Proteobacteria	Forehead	19.870	50.754	43.565	0.057	<0.0001	0.0055
Bacteroidetes	Forehead	0.679	1.449	2.353	0.096	0.0009	0.3832
Dietzia	Forehead	0.297	0.629	1.136	0.210	0.0033	0.2949
Micrococcus	Forehead	0.153	0.554	1.019	0.196	0.0003	0.7649
Leuconostoc	Forehead	0.023	0.379	2.663	0.980	0.0147	0.6437
Streptococcus	Forehead	1.453	1.719	4.816	0.495	0.0040	0.2980
Paracoccus	Forehead	0.176	0.356	1.336	0.314	0.0005	0.5069
Acinetobacter	Forehead	2.140	5.472	5.267	0.824	0.0371	0.7581
Enhydrobater	Forehead	0.401	1.284	1.221	0.184	0.0331	0.4686
Corynebacterium	Hand	4.010	2.829	1.413	0.345	0.0164	0.8079
Cutibacterium	Hand	3.883	2.759	1.007	0.529	0.0026	0.7473
Staphylococcus	Hand	15.365	7.837	4.255	1.336	0.0091	0.4853
Lactobacillus	Hand	1.517	4.328	0.851	0.700	0.0402	0.9095
Weissella	Hand	6.107	4.780	4.706	2.224	0.0208	0.2133
Xanthomonas	Hand	1.493	0.796	0.021	0.301	0.0021	0.8681

¹ Taxa representing >0.5% of the total sequences on the average across all 73 forehead or hand samples. ² Standard error of the mean.