Table 1.
Geometric mean and selected percentiles of N-desmethyl-acetamiprid concentrations in urine (first row in μg/L, shaded row in μg/g creatinine) for the U.S. population ≥3 years of age. Data from the National Health and Nutrition Examination Survey 2015-2016.
| Geometric mean (95% CI) | Selected percentile (95% CI) | Sample size | Weighted detection frequency | ||||
|---|---|---|---|---|---|---|---|
| 50th | 75th | 90th | 95th | ||||
| Total | * | < LOD | .331 (.272-.385) | .797 (.640-.956) | 1.29 (1.09-1.72) | 3012 | 35 |
| * | < LOD | .438 (.378-.488) | 1.06 (.795-1.30) | 1.93 (1.55-2.38) | 3011 | ||
| Age group | |||||||
| 3-5 years | * | .202 (<LOD-.238) | .707 (.533-.834) | 1.50 (1.13-2.35) | 2.57 (1.52-3.70) | 503 | 50.5 |
| * | .636 (<LOD-.737) | 1.48 (1.16-1.95) | 3.65 (2.52-4.59) | 5.38 (4.30-6.10) | 502 | ||
| 6-11 years | * | < LOD | .480 (.331-.662) | 1.01 (.786-1.59) | 1.62 (.981-2.23) | 416 | 46.7 |
| * | < LOD | .667 (.518-.848) | 1.42 (1.00-2.38) | 2.73 (1.69-3.80) | 416 | ||
| 12-19 years | * | < LOD | .380 (.265-.472) | .742 (.527-.956) | .998 (.742-1.69) | 403 | 37.8 |
| * | < LOD | .321 (.237-.457) | .665 (.483-1.15) | 1.24 (.652-2.23) | 403 | ||
| 20-59 years | * | < LOD | .298 (.211-.373) | .714 (.544-.963) | 1.24 (.923-1.60) | 1144 | 32.2 |
| * | < LOD | .372 (.311-.467) | .856 (.609-1.28) | 1.56 (1.08-2.09) | 1144 | ||
| 60 years and older | * | < LOD | .312 (.246-.376) | .648 (.475-1.08) | 1.87 (.986-2.42) | 546 | 33.8 |
| * | < LOD | .424 (.341-.551) | 1.02 (.816-1.35) | 2.49 (1.20-4.75) | 546 | ||
| Gender | |||||||
| Males | * | < LOD | .285 (.211-.376) | .640 (.498-.923) | 1.16 (.903-1.85) | 1491 | 31.8 |
| * | < LOD | .318 (.275-.378) | .700 (.584-.900) | 1.24 (.963-1.55) | 1491 | ||
| Females | * | < LOD | .361 (.297-.450) | .934 (.760-1.00) | 1.36 (1.16-1.86) | 1521 | 38 |
| * | < LOD | .538 (.438-.667) | 1.40 (1.00-1.90) | 2.22 (1.88-3.26) | 1520 | ||
| Race/ethnicity | |||||||
| All Hispanic | * | < LOD | .310 (.251-.376) | .674 (.550-.866) | 1.16 (.882-1.60) | 980 | 35.8 |
| * | < LOD | .424 (.368-.470) | .963 (.737-1.17) | 1.56 (1.29-2.33) | 980 | ||
| Non-Hispanic Blacks | * | < LOD | .323 (.260-.361) | .787 (.611-.945) | 1.67 (1.07-2.11) | 707 | 33.7 |
| * | < LOD | .311 (.263-.378) | .779 (.648-1.00) | 1.35 (1.12-1.99) | 706 | ||
| Non-Hispanic Whites | * | < LOD | .309 (.246-.385) | .752 (.568-.976) | 1.28 (.986-1.87) | 876 | 33.6 |
| * | < LOD | .439 (.350-.500) | 1.08 (.710-1.60) | 2.00 (1.56-2.84) | 876 | ||
| Others | * | < LOD | .517 (.373-.714) | 1.08 (.935-1.24) | 1.52 (1.16-1.98) | 449 | 43.3 |
| * | < LOD | .560 (.431-.700) | 1.27 (.881-1.67) | 1.93 (1.40-2.94) | 449 | ||
CI, confidence interval; LOD, limit of detection
< LOD means less than the limit of detection of 0.2 μg/L.
The weighted detection frequency represents the detection percentage of the population.
*
Not calculated. Proportion of results below the limit of detection was too high to provide a valid result.
Sample size may differ because of missing laboratory results.