Table 2.

Maximum Change in Milk Output and Breast Emptying Frequency (maximum value over 2–4 weeks of follow-up minus baseline value), Placebo versus Metformin groups (N = 15).

Variables	Placebo (n=5) Median [Q1–Q3]	Metformin (n=10) Median [Q1–Q3]	Z-statistic	p-value*
Maximum improvement in milk output over 2–4 weeks of follow-up (mL/24 hr)	−58 [−62 to −1]	+ 8 [−23 to 33]	−1.04	.31
Change in breast emptying frequency (between baseline and follow-up time point of maximum milk output)	−3 [−6 to 0]	−2 [−5 to 0]	0.06	.93

Note. Q1–Q3=interquartile range.

^*Placebo versus Metformin, Wilcoxon Rank Sum Test two-sided p-value.