Blood lead levels in pregnant women
| Variable | Blood lead distribution (µg/dl) | |||||
|---|---|---|---|---|---|---|
| N | mean±SD | ≤1 µg/dl | <10 µg/dl | ≥10 µg/dl | p<0.05 | |
| Overall N (row %) | 90 | 99±123 | 12 (13.3%) | 7 (7.8%) | 71 (78.9%) | |
| Age (years) | ||||||
| ≤21 | 4 | 28±49 | 1 (25%) | 2 (50%) | 1 (25%) | NS |
| 22–27 | 25 | 99±112 | 2 (5.7%) | – | 33 (94.3%) | NS |
| 28–33 | 39 | 92±124 | 7 (17.9%) | 3 (7.7%) | 29 (74.2%) | NS |
| ≥34 | 12 | 126±155 | 2 (16.6%) | 2 (16.6%) | 8 (66.7%) | NS |
| Residence | ||||||
| Urban | 57 | 77±100 | 9 (15.8%) | 6 (10.5%) | 42 (73.7%) | S** |
| Suburban | 17 | 127±135 | 1 (5.9%) | Nil | 16 (94.1%) | S* |
| Rural | 16 | 135±160 | 2 (12.5%) | 1 (6.3%) | 13 (81.2%) | S* |
Where N is the number of subjects in each group and their percentages are obtained by rows.
NS means not statistically significant.
S** means statistically significant difference when compared with the mean blood lead level (BLL) of the suburban and rural dwellers at p<0.05.
S* means statistically significant when compared with the mean BLL of the urban dwellers but not significant with the mean BLL of the rural or suburban dwellers.