Cadmium Concentrations in Blood and Seminal Plasma: Correlations with Sperm Number and Motility in Three Male Populations (Infertility Patients, Artificial Insemination Donors, and Unselected Volunteers)

Table 5 Examination of the relationship between seminal plasma cadmium levels and clinical outcomes.

A. Analysis of continuous variables
Subjects	Outcome	n	Spearman correlation coefficient, r	P
Group 1: infertility patients	Fertilization by numerical dose-compensated insemination	91	0.081	0.445, NS^a
Group 2: AI donors	Pregnancy by AID	12	−0.637	<0.032
Group 3: general population volunteers	Pregnancy by coitus	22	−0.168	0.451, NS

B. Group 1 subjects only
Variable	Group	n	Median	Interquartile range	Kruskal-Wallis test P value
Seminal plasma cadmium
	Not pregnant Clinical pregnancy Viable pregnancy	43 8 38	0.278 0.269 0.280	\(\left. {\matrix{ {0.245-0.337} \cr {0.247-0.303} \cr {0.246-0.355} \cr } } \right\}\)	0.722, NS

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