Black Tea May Be a Prospective Adjunct for Calcium Supplementation to Prevent Early Menopausal Bone Loss in a Rat Model of Osteoporosis

Table 2

Serum estradiol and PTH levels of sham-operated control group (Group A), bilaterally ovariectomized group (Group B), and ovariectomized + BTE-treated group (Group C) of rats.

Serum levels of hormones	Sham-operated control; (Group A)	Ovariectomized; (Group B)	Ovariectomized + BTE; (Group C)	Significance; level*	Significance level**
					Group A versus Group B	Group B versus Group C
Estradiol (pg/mL of serum)	70.95±1.84	14.81±1.70	41.52±2.44	𝑃<0.001	𝑃<0.01	𝑃<0.01
PTH (pg/mL of serum)	288.78±16.31	276.49±10.16	279.50±9.60	NS	NS	NS

Values are expressed as mean ± SE (𝑛=6); *denotes significance level based on the Kruskal-Wallis nonparametric ANOVA test, and **denotes significance level based on Mann-Whitney 𝑈 multiple-comparison test. NS denotes not significant.