TABLE 1

Sample Demographics

Wave 1Wave 2Wave 2 by Experimental Condition
Disease RisksAutism CorrectionNarrative DangerDisease ImagesControl
Sex, %
Female55565058535859
Male45445042474241
Race/ethnicity, %
White62626865536167
Black12129141997
Hispanic19191616222021
Other4454463
Multiracial3331342
Education, %
Some college29293128253328
Household income, %
Less than $30 00030302528342737$30 000–$59 99925242824212325$60 000–$99 99925252623272822$100 000+21202124172216
Age, %
Younger than 30 y20202118202220
30–40 y40393839393940
41 y and older41414043413940
Region, %
Northeast16161820141516
Midwest22222227212218
South37373533423638
West25252520232728
Number of children in household, %
139393541403842
240394639384232
315151413151218
45546456
5111222
6<1<1<1<11<1
7+<1<1
Refused, %<1
N22291759337340371337374
• Sample statistics are computed by using weights calculated by Knowledge Networks41; weights are calculated separately for each wave so that the sample reflects the population of parents of children age 0 to 17 y from the Knowledge Networks panel. Due to rounding, some percentages may not add to 100%. The number of children in household was only asked in wave 1; the proportions listed for wave 2 reflect answers from wave 1 among those who completed both waves of the survey. Pearson’s χ2 is non-significant for differences across intervention groups after a Bonferroni correction for multiple comparisons.