Table 2 Matrix of correlation (Spearman's r) for hPL and βhCG (number of cases = 155).

	Cellular hPL	Plasma hPL	hPL
Cellular hPL	1.000	0.094	0.168*
Plasma hPL	0.094	1.000	0.705**
hPL	0.168*	0.705**	1.000

	Cellular βhCG1	Plasma βhCG2	βhCG3
Cellular βhCG1	1.000	0.584**	0.676**
Plasma βhCG2	0.584**	1.000	0.648**
βhCG3	0.676**	0.648**	1.000

*Correlation is significant, p<0.05 (two‐tailed); **correlation is significant, p<0.01 (two‐tailed).