Fig. 4

Proportion of participants with CM stomach-heat syndrome and/or kidney-yin deficiency over the study period. a Stomach-heat (SH) syndrome, b Kidney-yin deficiency (KYD), c combined stomach-heat and kidney-yin deficiency, Dashed line placebo group; solid line mYJ group. *P < 0.05, **P < 0.001, control vs. test group at corresponding time point, Fisher exact test. Significant improvement of stomach-heat, kidney-yin deficiency alone in test or placebo group or stomach-heat and/or kidney-yin deficiency in test group over time was observed (Chi square test for trend, P < 0.001); no such improvement could be observed in control group when combined stomach-heat and/or kidney-yin deficiency was followed over time (c)