Table 1.
Content of mercury (in ng/g on dry mass basis) in the femoral head and neck samples, according to various factors (N = 95)
| Factors | Femoral head | Femoral neck | |||||
|---|---|---|---|---|---|---|---|
| Med. Q1–Q3 (ng/g) |
Min–max (ng/g) | M–WU | Med. Q1–Q3 (ng/g) |
Min–max (ng/g) | M–WU | ||
| Total mercury content | 17.3 (11.7–32.2) | (3.6–128.5) | 0.01 | 26.3 (12.5–48.5) | (2–176.5) | 0.01 | |
| Age | <60 (n = 37) | 15.2 (11.7–29.5) | (7.4–90.2) | NS | 24.9 (12.2–39.3) | (8–146) | NS |
| >60 (n = 58) | 18 (11.8–32.8) | (3.6–128.5) | 26.85 (13–50.8) | (2–176.5) | |||
| Gender | Women (n = 57) | 15.7 (10.3–27.6) | (3.6–128.5) | NS | 25.1 (12.2–44.2) | (2–169.6) | NS |
| Men (n = 38) | 20.05 (13.1–32.7) | (8.4–90.2) | 30.7 (14.7–48.6) | (5.9–176.5) | |||
| Type of osteoarthritis | Primary idiopathic (n = 54) | 18 (11.8–32.7) | (3.6–65.7) | NS | 29.8 (13.1–48.5) | (2–169.6) | NS |
| Secondary developmental dysplasia of the hip (n = 41) | 15.2 (11.3–28.5) | (7.4–128.5) | 23.8 (11.8–40) | (6.7–176.5) | |||
| Avascular necrosis of the femoral head | Yes (n = 13) | 20.2 (14.3–38.6) | (8.8–90.2) | NS | 23.5 (16.4–51.9) | (6.7–176.5) | NS |
| No (n = 82) | 15.8 (11.3–31) | (3.6–128.5) | 26.5 (12.2–40) | (2–169.6) | |||
| Place of residence | City (n = 71) | 15.5 (11.7–32.2) | (7.2–90.2) | NS | 26.3 (12.5–44.2) | (5.9–169.6) | NS |
| Village (n = 24) | 20.05 ( 11.6–28.95) | (3.6–128.5) | 27.6 (13.5–52.85) | (2–176.5) | |||
| Contact with paints | No (n = 86) | 16.6 (11.7–29.5) | (3.6–128.5) | NS | 27.65 (13.3–50.8) | (2–176.5) | <0.01 |
| Yes (n = 9) | 32.7 (11.8–38.6) | (8.4–90.2) | 11.8 (9.4–16.4) | (5.9–31.3) | |||
| Chemicals | No (n = 66) | 17.3 (11.7–31) | (3.6–128.5) | NS | 26.7 (14.8–48.5) | (2–176.5) | NS |
| Yes (n = 29) | 15 (11.8–32.7) | (8.4–90.2) | 16.4 (10–40) | (5.9–99.3) | |||
| Physical activity | Yes (n = 80) | 17.3 (11.9–31.9) | (3.6–128.5) | NS | 26.9 (13.2–48.6) | (2–176.5) | NS |
| No (n = 15) | 14.3 (9.7–32.2) | (8.3–90.2) | 15.6 (11–34.4) | (6.7–169.6) | |||
| Fish consumption | No (n = 87) | 17.3 (11.7–32.2) | (3.6–128.5) | NS | 26.3 (13.1–48.5) | (2–176.5) | NS |
| Yes (n = 8) | 14.3 (11.2–25.25) | (7.2–37.6) | 22 (11.4–42.9) | (9.7–51.5) | |||
| High tea consumption | Yes (n = 16) | 22.75 (13–32.5) | (9.7–90.2) | NS | 30.4 (14–60.9) | (8.9–146) | NS |
| No (n = 79) | 15.9 (11.1–31) | (3.6–128.5) | 25.7 (12.2–44.2) | (2–176.5) | |||
| High coffee consumption | Yes (n = 9) | 19.9 (11.8–28.2) | (9.4–65.7) | NS | 55.1 (24.9–80.7) | (8.9–176.5) | NS |
| No (n = 86) | 15.8 (11.7–32.2) | (3.6–128.5) | 25.9 (12.5–39.3) | (2–169.6) | |||
| Smoking | Non-smoker (n = 72) | 16.6 (11.9–28.3) | (3.6–128.5) | NS | 26.5 (13.8–48.55) | (2–176.5) | NS |
| Smoker (n = 23) | 23.3 (11.1–34.2) | (7.9–90.2) | 24.9 (10.4–44.2) | (8.1–101) | |||
| Alcohol consumption | Yes (n = 49) | 18.3 (12–32.7) | (7.9–90.2) | NS | 30.4 (12.5–51.9) | (5.9–176.5) | NS |
| No (n = 46) | 15.6 (11.1–28.2) | (3.6–128.5) | 25.35 (13–37.4) | (2–169.6) | |||
Med. median, QL lower quartile, QU upper quartile, M–WU Mann–Whitney U test, p level of significance, NS difference not significant