Table 2.
Proportional increase in analyte concentration in carpet dust (ng/g) for selected uses.
| Crawling insects
|
Flying insects
|
Fleas/ticks
|
Termites
|
Lawn/garden insects
|
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Insecticide, imputation approacha method | Adjustment | exp(β ) | SE | exp(β ) | SE | exp(β ) | SE | exp(β ) | SE | exp(β ) | SE |
| Propoxur | |||||||||||
| DL/2 | No | 1.426b | 1.167 | 0.987 | 1.144 | 1.231 | 1.153 | 1.145 | 1.219 | 0.756b | 1.151 |
| E[Z|LB < Z < UB] | No | 1.432b | 1.170 | 0.986 | 1.147 | 1.231 | 1.156 | 1.135 | 1.223 | 0.751b | 1.154 |
| Fill-in | No | 1.459b | 1.189 | 0.966 | 1.163 | 1.225 | 1.173 | 1.072 | 1.249 | 0.737c | 1.171 |
| Fill-in | Yes | 1.511b | 1.182 | 1.030 | 1.157 | 1.251 | 1.166 | 1.209 | 1.239 | 0.687b | 1.165 |
| Multiple impute | Yes | 1.487b | 1.196 | 1.016 | 1.165 | 1.247 | 1.170 | 1.082 | 1.244 | 0.704b | 1.173 |
| Direct estimate | Yes | 1.503c | 1.276 | 0.994 | 1.235 | 1.245 | 1.250 | 1.090 | 1.363 | 0.714 | 1.249 |
| Carbaryl | |||||||||||
| DL/2 | No | 0.853 | 1.201 | 0.661b | 1.173 | 1.560b | 1.185 | 1.129 | 1.266 | 1.660b | 1.183 |
| E[Z|LB < Z < UB] | No | 0.849 | 1.226 | 0.629b | 1.194 | 1.703b | 1.208 | 1.199 | 1.300 | 1.746b | 1.205 |
| Fill-in | No | 0.830 | 1.311 | 0.591b | 1.265 | 1.812b | 1.285 | 1.486 | 1.417 | 1.735b | 1.282 |
| Fill-in | Yes | 0.940 | 1.274 | 0.432b | 1.235 | 2.337b | 1.252 | 1.538 | 1.366 | 1.779b | 1.249 |
| Multiple impute | Yes | 0.826 | 1.338 | 0.508b | 1.272 | 2.047b | 1.313 | 1.326 | 1.490 | 1.950b | 1.351 |
| Direct estimate | Yes | 0.785 | 1.499 | 0.512c | 1.413 | 2.180b | 1.452 | 1.281 | 1.651 | 2.115b | 1.444 |
| Chlorpyrifos | |||||||||||
| DL/2 | No | 1.578b | 1.209 | 0.779 | 1.181 | 1.264 | 1.182 | 1.581c | 1.276 | 0.759 | 1.188 |
| E[Z|LB < Z < UB] | No | 1.620b | 1.218 | 0.771 | 1.188 | 1.300 | 1.190 | 1.613c | 1.288 | 0.746 | 1.196 |
| Fill-in | No | 1.917b | 1.243 | 0.757 | 1.210 | 1.389c | 1.212 | 1.669c | 1.322 | 0.713c | 1.219 |
| Fill-in | Yes | 1.745b | 1.244 | 0.740 | 1.210 | 1.383c | 1.212 | 1.631c | 1.323 | 0.731 | 1.219 |
| Multiple impute | Yes | 1.770b | 1.252 | 0.763 | 1.223 | 1.401c | 1.223 | 1.689c | 1.336 | 0.708 | 1.234 |
| Direct estimate | Yes | 1.796c | 1.378 | 0.740 | 1.323 | 1.392 | 1.327 | 1.698 | 1.492 | 0.702 | 1.338 |
| α-Chlordane | |||||||||||
| DL/2 | No | 0.966 | 1.129 | 0.938 | 1.112 | 0.910 | 1.118 | 2.626b | 1.168 | 1.091 | 1.117 |
| E[Z|LB < Z < UB] | No | 0.954 | 1.153 | 0.925 | 1.132 | 0.894 | 1.140 | 3.031b | 1.199 | 1.110 | 1.138 |
| Fill-in | No | 1.060 | 1.230 | 0.828 | 1.198 | 0.868 | 1.210 | 3.110b | 1.303 | 1.079 | 1.208 |
| Fill-in | Yes | 0.762 | 1.206 | 0.927 | 1.177 | 0.908 | 1.188 | 3.898b | 1.271 | 1.293 | 1.186 |
| Multiple impute | Yes | 0.852 | 1.363 | 0.915 | 1.235 | 0.804 | 1.202 | 3.686b | 1.290 | 1.169 | 1.270 |
| Direct estimate | Yes | 0.858 | 1.379 | 0.919 | 1.316 | 0.803 | 1.339 | 3.666b | 1.442 | 1.211 | 1.334 |
Entries are exponentials of parameter estimates (β) and their SEs from linear regression models of the logarithm of pesticide analyte on age, sex, race, education, study site, season, and pesticide use variables. Regression models also included year house was built (propoxur, carbaryl, α-chlordane), type of home (carbaryl), and presence of oriental rugs (α-chlordane).
a
See “Materials and Methods” for a description of methods; adjusted imputation includes regression variables.
b
95% CI excludes 1.
c
90% CI excludes 1.