Table 4.

Spearman’s correlation coefficients for cadmium, nickel, copper and zinc from other parameters in tissues of the knee joint

Parameters	Zn	Ni	Cu	Cd	Age	Gender	Place of residence	Knee (left, right)	Body weight	Height	BMI	Smoking
Ni	–0.11
Cu	–0.29*	0.45*
Cd	0.40*	–0.05	–0.01
Type of bone	–0.69*	0.18*	0.36*	–0.39*
Age	0.06	0.16	0.23*	–0.04
Gender	0.06	–0.11	0.04	0.18*	0.05
Place of residence	0.08	–0.08	–0.04	–0.19*	–0.07	–0.22*
Knee (left, right)	0.06	–0.01	0.14	0.03	0.06	–0.06*	0.19*
Body weight	–0.03	0.00	–0.05	0.02	–0.40*	0.20*	–0.19*	0.01
Height	0.04	0.01	0.05	0.13	–0.01	0.68*	–0.36*	–0.16	0.52*
BMI	–0.03	0.00	–0.05	0.02	–0.40*	0.20*	–0.19*	0.01	1.00	0.52*
Smoking	0.00	0.21*	0.04	–0.10	0.15	–0.31*	–0.13	0.04	0.02	–0.11	0.02
Beginning pain	–0.10	0.07	0.05	0.01	0.14	–0.03	–0.04	–0.17*	–0.17	–0.10	–0.17	0.16

(*p < 0.05, statistically significant