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International Journal of Phytomedicine and Phytotherapy

Table 3 Mean, standard error of the mean (SEM), and p-value for the effect of treatment on testosterone levels between the STT and placebo groups

From: A preliminary study of the efficacy of the polyherbal preparation Sao Thong Tai for erectile dysfunction among elderly men: a double-blind, randomized controlled trial

Laboratory tests STT Placebo p-value
Mean SEM Mean SEM
1st visit testosterone (SI: nmol/L) 20.40 1.88 18.14 1.60 0.36
2nd visit testosterone (SI: nmol/L) 20.08 1.76 18.36 1.71 0.48
3rd visit testosterone (SI: nmol/L) 19.93 1.78 17.61 1.57 0.33
1st visit testosterone (conventional: ng/mL) 5.89 0.54 5.23 0.46 0.36
2nd visit testosterone (conventional: ng/mL) 5.63 0.50 5.35 0.49 0.68
3rd visit testosterone (conventional: ng/mL) 5.75 0.51 5.04 0.47 0.31
1st visit bioavailable testosterone (calculated) 1.71 0.08 1.94 0.12 0.12
2nd visit bioavailable testosterone (calculated) 1.75 0.08 1.99 0.13 0.14
3rd visit bioavailable testosterone (calculated) 1.69 0.09 1.91 0.15 0.24