Table 4.

Serum electrolytes in Wu-ling-san formula and placebo groups.

	Wu-ling-san group (mean±S.D.)			Placebo group			P value (% of change)
	Pretreatment	Post-treatment	% of change	Pretreatment	Post-treatment	% of change
Serum Na (mmol/L)	141.6 ± 1.3	140.9 ± 1.2	−0.5%	140.6 ± 1.3	140.9 ± 1.7	0.2%	0.12
Serum K (mmol/L)	4.0 ± 0.3	4.0 ± 0.3	0.7%	4.2 ± 0.5	4.0 ± 0.3	−3.2%	0.16
Serum Ca (mg/dl)	9.2 ± 0.3	9.1 ± 0.4	−0.8%	9.1 ± 0.3	9.2 ± 0.3	0.3%	0.47
Serum P (mg/dl)	3.3 ± 0.6	3.3 ± 0.5	4.0%	3.1 ± 0.6	3.2 ± 0.5	4.3%	0.96

Data presented as mean ±SD

^*Percentage of change between groups P < 0.05 (independent t-test)