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Table 3 Correlation of gut microbiota and immune indices: correlation between gut microbiota and serum immunoglobulin levels

From: Possible correlation between gut microbiota and immunity among healthy middle-aged and elderly people in southwest China

  Middle-aged group Elderly group
IgA IgG IgM IgA IgG IgM
Phylum
 Actinobacteria 0.023 − 0.012 − 0.069 0.001 0.157 0.137
 Bacteroidetes 0.158 0.246* 0.218 − 0.125 − 0.102 − 0.062
 Firmicutes − 0.009 0.085 − 0.243* 0.102 0.041 0.086
 Proteobacteria − 0.021 − 0.208 0.154 0.004 − 0.119 0.131
 Verrucomicrobia − 0.049 − 0.011 0.001 0.428** − 0.040 0.025
 Bacteroidetes/Firmicutes 0.136 0.222* 0.243* − 0.107 − 0.099 − 0.074
Richness/diversity
 Chao 0.050 0.063 − 0.087 0.261* 0.094 − 0.145
 Observed Species 0.092 0.083 − 0.065 0.280* 0.048 − 0.227
 Shannon 0.083 0.093 0.020 0.199 − 0.043 − 0.020
 Simpson − 0.079 − 0.082 − 0.022 − 0.139 0.094 − 0.076
  1. Spearman’s correlation coefficient was calculated between the presence of gut microbiota and serum immunoglobulin levels. * and ** indicate significant difference with a P value of < 0.05 and < 0.01, respectively. Observed species value and chao value can reflect the species richness of community. Shannon value and simpson value can reflect the species diversity of the community