Table 1. Weighted Prevalence Estimates of Ever-Diagnosed and Current Autism Spectrum Disorder (ASD) Among US Children Aged 3 to 17 Years.
| Characteristic | Ever-Diagnosed ASD | Current ASD | ||||
|---|---|---|---|---|---|---|
| Unweighted No. of Participants | Prevalence, % (95% CI) | P Valuea | Unweighted No. of Participants | Prevalence, % (95% CI) | P Valuea | |
| Overall prevalence | 43 032 | 2.79 (2.46-3.12) | NA | 43 021 | 2.50 (2.21-2.79) | NA |
| Age, y | .62 | .23 | ||||
| 3-5 | 7533 | 2.45 (1.47-3.43) | 7530 | 1.97 (1.31-2.62) | ||
| 6-11 | 14 930 | 2.77 (2.26-3.28) | 14 925 | 2.61 (2.11-3.10) | ||
| 12-17 | 20 569 | 2.96 (2.53-3.40) | 20 566 | 2.65 (2.24-3.06) | ||
| Sex | <.001 | <.001 | ||||
| Male | 22 072 | 4.35 (3.76-4.93) | 22 064 | 3.88 (3.38-4.38) | ||
| Female | 20 960 | 1.16 (0.88-1.45) | 20 957 | 1.07 (0.79-1.35) | ||
| Race/ethnicityb | .20 | .35 | ||||
| Hispanic | 4734 | 2.61 (1.81-3.42) | 4734 | 2.43 (1.65-3.21) | ||
| Non-Hispanic white | 30 220 | 2.84 (2.49-3.19) | 30 215 | 2.57 (2.24-2.91) | ||
| Non-Hispanic black | 2547 | 3.44 (2.05-4.84) | 2542 | 2.79 (1.91-3.66) | ||
| Non-Hispanic Asian | 2346 | 1.37 (0.77-1.97) | 2345 | 1.28 (0.70-1.86) | ||
| Other | 3185 | 2.66 (1.91-3.42) | 3185 | 2.46 (1.73-3.19) | ||
| Family income to poverty ratio | .01 | .001 | ||||
| <1.0 | 4211 | 3.76 (2.80-4.73) | 4209 | 3.58 (2.63-4.54) | ||
| 1.0-1.9 | 6878 | 2.90 (2.03-3.76) | 6873 | 2.32 (1.76-2.88) | ||
| 2.0-3.9 | 13 254 | 2.44 (1.98-2.90) | 13 252 | 2.26 (1.81-2.70) | ||
| ≥4.0 | 18 689 | 2.30 (1.90-2.70) | 18 687 | 2.07 (1.70-2.44) | ||
| Insurance type | <.001 | <.001 | ||||
| Public only | 7804 | 4.21 (3.32-5.09) | 7800 | 3.79 (3.03-4.54) | ||
| Private only | 31 464 | 2.00 (1.72-2.29) | 31 460 | 1.77 (1.51-2.04) | ||
| Private and public | 1551 | 5.42 (3.94-6.89) | 1551 | 5.23 (3.79-6.67) | ||
| Unspecified | 485 | 3.37 (0.32-6.42) | 484 | 2.76 (0-5.58) | ||
| Not insured | 1574 | 0.93 (0.47-1.39) | 1572 | 0.88 (0.42-1.33) | ||
Abbreviation: NA, not applicable.
a
P values for overall differences in prevalence by strata.
b
Race and Hispanic ethnicity were self-reported and classified based on 1997 US Office of Management and Budget standards.