The Effect of Risk Factors on the Levels of Chemical Elements in the Tibial Plateau of Patients with Osteoarthritis following Knee Surgery

Table 2

The concentration ratios chemical elements in human tibial plateau from patients after knee surgery (mg/kg dm).

	Se/Pb	Se/Cd	Se/THg	F^−/Ca ⋅ 1000
Female ()
AM ± SD	0.03 ± 0.02	1.53 ± 1.12	19.13 ± 12.84	41.28 ± 21.81
Med.	0.03	1.15	14.56	40.16
Range	0.009–0.10	0.35–4.93	0.35–4.93	13.19–91.27
QL–QU	0.02–0.03	0.77–2.17	8.56–32.99	22.90–49.70
Male ()
AM ± SD	0.02 ± 0.02	1.30 ± 1.32	14.74 ± 13.84	39.52 ± 18.74
Med.	0.02	0.94	8.63	34.40
Range	0.01–0.04	0.18–4.5	3.12–47.41	16.40–73.82
QL–QU	0.01–0.02	0.42–1.32	4.70–18.51	19.90–54.97
Total
AM ± SD	0.03 ± 0.02	1.45 ± 1.17	17.66 ± 13.13	40.69 ± 20.56
Med.	0.02	1.05	13.40	37.71
Range	0.02–0.10	0.18–4.93	0.94–47.41	13.20–91.27
QL–QU	0.02–0.03	0.76–2.13	8.04–31.41	22.90–53.60
Female versus Male
	35	NS	NS	NS
	0.001

AM: arithmetic mean; SD: standard deviation; Q_L: lower quartile; Q_U: upper quartile; : Mann-Whitney test; : level of significance; NS: nonsignificant difference; F⁻/Ca ⋅ 1000: F⁻ concentration in the inorganic portion of bone.