Table 3.

Correlation analysis

Estradiol (serum)	Estradiol (CSF)	rho = 0.120	p = 0.595
Progesterone (serum)	Progesterone (CSF)	rho = 0.212	p = 0.344
Testosterone (serum)	Testosterone (CSF)	rho = 0.236	p = 0.290

Spearman rank correlation analysis of CSF and serum levels revealed no strong correlation for estradiol, progesterone or testosterone between serum and CSF. An absolute value of the correlation coefficient (rho) of 0.00–0.19 indicates a very weak correlation, 0.20–0.39 a weak correlation, 0.40–0.59 a moderate correlation, 0.60–0.79 a strong correlation and a value of 0.80–1.0 a very strong correlation

CSF cerebrospinal fluid