|
Metals and metalloids in urine and serum in two consecutive investigations |
||||||||
| Variable |
N |
Median |
5%-value |
95%-value |
Spearman correlation coefficient (p) |
ICC |
ICC 5%-value |
|
|
|
||||||||
| As in urine (μg/L) |
2003/04 |
201 |
3.10 |
0.70 |
9.30 |
0.28 (0.0001) |
-0.06 |
-0.18 |
| 2004/05 |
189 |
2.90 |
0.80 |
8.90 |
||||
| Cd in urine (μg/L) |
2003/04 |
201 |
0.60 |
0.15 |
2.15 |
0.48 (< 0.0001) |
0.44 |
0.34 |
| 2004/05 |
189 |
0.70 |
0.27 |
1.91 |
||||
| Creatinine in morning urine (g/L) |
2003/04 |
201 |
0.72 |
0.15 |
1.80 |
-0.06 (0.40) |
-0.47 |
-0.56 |
| 2004/05 |
189 |
0.75 |
0.10 |
1.95 |
||||
| Pb in blood (μg/L) |
2003/04 |
201 |
90.90 |
47.10 |
213.00 |
0.70 (< 0.0001) |
0.69 |
0.62 |
| 2004/05 |
189 |
85.00 |
39.10 |
203.00 |
||||
| Se in serum (μg/L) |
2003/04 |
201 |
56.90 |
36.00 |
78.50 |
0.45 (< 0.0001) |
0.17 |
0.05 |
| 2004/05 |
189 |
72.10 |
46.40 |
95.70 |
||||
|
The intraclass correlation coefficient (ICC) is the between- subject minus the within- subject variance as a ratio to the sum of the two variances. A positive value of, for instance, 0.60 indicates that 60% of the variation is due to between-subject and 40% due to within-subject variance. ICC can become negative when the within-subject variance exceeds the between-subject variance. | ||||||||
Karmaus et al. Environmental Health 2008 7:11 doi:10.1186/1476-069X-7-11 |
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