High Prevalence of Leptotrichia amnionii, Atopobium vaginae, Sneathia sanguinegens, and Factor 1 Microbes and Association of Spontaneous Abortion among Korean Women

Table 3

Factor loadings determined by principal component analysis.

Bacteria	Factor 1	Factor 2	Factor 3	Factor 4	Factor 5	Factor 6	Factor 7
AY959069_s	0.404	−0.007	−0.006	−0.008	0.002	−0.055	−0.062
Lactobacillus fornicalis	−0.133	−0.04	−0.032	0.639	−0.09	−0.07	−0.06
AY958888_s	0.613	−0.013	−0.031	0.011	−0.02	−0.052	−0.005
Leptotrichia amnionii	0.4	−0.007	0.293	−0.051	−0.06	0.124	−0.082
AY959109s	0.741	−0.009	−0.033	0.003	0.011	0.026	0.021
Prevotella timonensis	0.414	0.0077	0.01	−0.028	0.019	0.062	−0.068
Prevotella amnii	0.528	0.0242	0.05	0.047	−0.01	0.103	−0.032
AY958940_s	0.631	0.0043	0.032	0.029	−0.03	0.046	−0.018
Megasphaera	0.711	−0.022	−0.042	−0.026	−0.05	−0.066	−0.006
AY959023	0.612	−0.011	−0.026	0.016	−0.03	−0.114	−0.009
P003395_s	0.525	−0.009	−0.053	0.038	−0.02	−0.143	0.023
DQ666092_s	0.215	−0.02	0.006	−0.041	−0.07	−0.039	0.067
Sneathia_sanguinegens	0.208	−0.002	−8	−0.002	−0.01	0.027	−0.032
AY995258_s	0.158	−0.003	0.016	0.016	−0.02	−0.03	0.026
Escherichia coli	−0.039	0.9649	−0.012	−0.004	−0.08	−0.056	−0.01
Streptococcus anginosus	−0.018	0.5555	0.013	0.011	0.328	0.083	−0.02
Escherichia fergusonii	−0.036	0.9649	−0.011	−5	−0.08	−0.055	−0.011
Peptostreptococcus anaerobius	−0.032	−0.006	0.986	0.011	−0.01	−0.045	−0.008
Peptoniphilus indolicus	−0.025	−0.003	0.987	0.009	−0.01	−0.044	−0.012
Pseudomonas trivialis	−0.094	−0.027	−0.027	−0.156	−0.07	0.016	−0.01
Lactobacillus psittaci	−0.13	−0.034	−0.034	0.773	−0.11	−0.05	−0.003
Lactobacillus jensenii	−0.115	−0.008	−0.028	0.7	−0.06	−0.025	0.004
Mycoplasma hominis	−0.025	0.1032	0.003	0.029	0.58	0.086	0.066
Lactobacillus gasseri	−0.04	−0.061	−0.009	−0.027	0.649	−0.071	−0.062
Lactobacillus acidophilus	−0.025	0.025	−0.001	0.019	0.774	0.049	−0.086
Aerococcus christensenii	−0.072	−0.008	−0.022	−0.058	0.04	0.33	0.123
Dialister micraerophilus	0.146	0.0147	0.014	0.048	−0	0.822	−0.025
Staphylococcus epidermidis	−0.06	−0.01	−0.008	−0.012	−0.01	0.277	−0.027
Enterococcus faecalis	−0.066	−0.003	−0.005	0.037	−0.05	0.704	−0.068
Lactobacillus iners	−0.192	−0.105	−0.073	−0.452	−0.26	−0.102	−0.209
Lactobacillus crispatus	−0.298	−0.062	−0.076	0.183	−0.06	−0.28	−0.415
Atopobium vaginae	0.259	−0.03	−0.021	0.192	−0.07	0.146	0.334
Prevotella bivia	−0.031	−0.015	−0.024	0.041	0.182	0.022	0.312
Lactobacillus vaginalis	−0.191	−0.058	−0.056	0.325	−0.04	−0.225	−0.375
Gardnerella vaginalis	−0.076	−0.02	−0.011	−0.012	0.032	−0.132	0.719
Ureaplasma parvum	−0.077	−0.013	−0.016	−0.01	0.519	−0.069	0.147
Streptococcus agalactiae	−0.084	−0.012	−0.015	−0.062	−0.03	0.099	0.143
Prevotella denticola	−0.066	−0.008	−0.001	−0.009	−0.07	−0.126	0.61
Ureaplasma urealyticum	−0.046	−0.008	−0.004	−0.021	−0.03	0.005	0.037
Pseudomonas cedrina	−0.043	−0.011	−0.001	−0.06	−0.02	−0.018	0.034
Microbacterium hydrocarbonoxydan	−0.05	−0.016	−0.011	0.093	−0.05	−0.022	−0.007
Streptococcus pseudopneumoniae	−0.074	0.0159	−0.012	−0.078	0.051	0.011	0.093
Lactobacillus johnsonii	−0.048	−0.008	−0.007	−0.059	0.078	−0.028	−0.002
Microbacterium ginsengisoli	−0.037	−0.006	−0.005	−0.045	−0.02	−0.007	0.01
Streptococcus salivarius	−0.049	0.0005	−0.008	−0.056	−0.02	−0.012	0.022

Principal component analysis was performed for all 45 microbial species. A total of seven factors showing an eigenvalue > 1.5 were identified, and the factor-loading values of 45 species in each factor were calculated. − means negative correlation.