Table 3.
Limits of detection and summary statistics for DAP compounds in house dust for 20 Salinas agricultural homes and 20 Oakland urban homes by collection time point (ng/g).a,b
| DAPs | LOD (ng/g) | Homes | Collection time point | % DF | Concentration in dust (ng/g)
|
|||
|---|---|---|---|---|---|---|---|---|
| p50 | p75 | p95 | Max | |||||
| DEP | 10.4 | Agricultural | 1 | 60 | 30 | 57 | 246 | 386 |
| 2 | 70 | 43 | 66 | 484 | 859 | |||
| Urban | 1 | 70 | 50 | 79 | 246 | 316 | ||
| 2 | 63 | 47 | 64 | 245 | 245 | |||
| DETP | 5.8 | Agricultural | 1 | 10 | <LOD | <LOD | 154 | 183 |
| 2 | 0 | — | — | — | — | |||
| Urban | 1 | 0 | — | — | — | — | ||
| 2 | 0 | — | — | — | — | |||
| DEDTP | 5.2 | Agricultural | 1 | 5 | <LOD | <LOD | <LOD | 31 |
| 2 | 5 | <LOD | <LOD | <LOD | 11 | |||
| Urban | 1 | 0 | — | — | — | — | ||
| 2 | 0 | — | — | — | — | |||
| DMP | 4.8 | Agricultural | 1 | 45 | <LOD | 8 | 28 | 29 |
| 2 | 50 | <LOD | 20 | 425 | 806 | |||
| Urban | 1 | 40 | <LOD | 9 | 822 | 1588 | ||
| 2 | 26 | <LOD | 8 | 79 | 79 | |||
| DMTP | 2.8 | Agricultural | 1 | 0 | — | — | — | — |
| 2 | 0 | — | — | — | — | |||
| Urban | 1 | 5 | <LOD | <LOD | <LOD | 17 | ||
| 2 | 5 | <LOD | <LOD | <LOD | 20 | |||
| DMDTP | 9.9 | Agricultural | 1 | 20 | <LOD | <LOD | 70 | 98 |
| 2 | 10 | <LOD | <LOD | 20 | 22 | |||
| Urban | 1 | 5 | <LOD | <LOD | <LOD | 17 | ||
| 2 | 11 | <LOD | <LOD | 18 | 18 | |||
Abbreviations: DF, detection frequency; LOD, limit of detection; “—”, statistic not reported when analyte was not detected.
a
One participant in the urban cohort (Oakland, CA) was lost to follow-up before collection of the second dust sample; thus, statistics reported for the second collection time point are for 19 urban homes.
b
Samples 1 and 2 were collected 5–8 days apart from the same general location in the home.