Table 4
Urinary Cd levels of male and female subjects, stratified by sources of drinking water.
Men Women
Response of the subjects Yes No Yes No
Source of drinking water Mean SD/SE Mean SD/SE Mean SD/SE Mean SD/SE
Bottle water N = 49 N = 259 N = 94 N = 396
Age (age) 48.7 15.2 52.6 15 50.4 15.8 50.7 12.9
U–Cd (g/gCr) 5.05 2.69 5.37 2.36 4.8 2.99 6.05 2.15
Age-adjusted U–Cd 5.24 1.13 5.33 1.06 4.81 1.09 6.05 1.04*
Tap water N = 49 N = 259 N = 116 N = 374
Age (age) 48.8 16.9 52.6 14.6 44.6 13.6 51.8 13.2***
U–Cd (g/gCr) 4.33 2.34 5.53 2.42 4.91 3.31 5.98 2.12
Age-adjusted U–Cd 4.49 1.13 5.49 1.06 5.17 2.1 5.92 1.04
Well water N = 258 N = 50 N = 463 N = 27
Age (age) 52.5 14.6 49.5 17.1 52 12.9 46.4 14.5
U–Cd (g/gCr) 5.71 2.24 3.69 3.07* 6.17 2.11 4.79 2.89*
Age-adjusted U–Cd 5.68 1.05 3.8 1.13### 6.1 1.04 4.96 1.08#
Rain water N = 231 N = 77 N = 390 N = 100
Age (age) 52.4 14.8 50.8 15.9 50.8 13.4 49.9 14.3
U–Cd (g/gCr) 5.36 9.16 5.21 2.34 5.78 2.23 5.85 2.68
Age-adjusted U–Cd 5.33 1.06 5.29 1.1 5.77 1.04 5.88 1.09
River water N = 14 N = 294 N = 27 N = 461
Age (age) 52.8 11.8 52 15.2 47.3 12.6 50.8 13.6
U–Cd (g/gCr) 6.62 2.19 5.26 2.42 8.11 1.95 5.68 2.33*
Age-adjusted U–Cd 6.56 1.26 5.27 1.05 8.37 1.17 5.67 1.04#
Mean: geometrical mean, estimated mean after adjustment of age; SD/SE: geometrical standard deviation, standard error after adjustment of age.
* Comparisons of means between two groups were tested by t-test; P < 0.05. *** Comparisons of means between two groups were tested by t-test; P < 0.001. # Comparisons between 2 groups after adjustment for age were analyzed by GLM; P < 0.05. ### Comparisons between 2 groups after adjustment for age were analyzed by GLM; P < 0.001.
Alt