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. 2019 Mar 8;14(4):381–395. doi: 10.1093/scan/nsz017

Table 1.

Demographic characteristics of the original sample, the replication sample and the combined samples. *Indicates statistically significant differences between original and partial sample (P < 0.05)

Original sample (N = 507) Replication sample (N = 597) Full Sample (N = 1104)
Sex
Male 40.6% 50.1% 45.7%
Female 59.4% 49.9% 54.3%
Age* 29.2 (3.5) 28.5 (3.8) 28.8 (3.7)
Race*
White or Caucasian 72.6% 76.5% 74.7%
Black or African American 22.3% 9.0% 15.1%
Asian American 1.8% 9.0% 5.7%
Native American 0.0% 0.3% 0.2%
More than one race 1.2% 3.7% 2.5%
Not sure or unknown 2.2% 1.3% 1.7%
Ethnicity*
Hispanic or Latino 10.1% 7.6% 8.5%
Not Hispanic or Latino 89.7% 90.8% 90.3%
Not sure or unknown 0.2% 2.0% 1.2%
Income
$1000–$9999/year 7.9% 6.4% 7.1%
$10 000–$19 999/year 7.7% 8.0% 7.9%
$20 000–$29 999/year 13.6% 11.4% 12.5%
$30 000–$39 999/year 10.8% 12.9% 12.0%
$40 000–$49 999/year 10.8% 9.7% 10.3%
$50 000–$74 999/year 18.7% 22.9% 21.1%
$75 000–$99 999/year 15.4% 11.6% 13.4%
$100 000–$149 999/year 14.4% 16.4% 15.6%
Years of education 14.8 15.0 (1.7) 14.92 (1.80)

Note: Demographic information is presented as Mean (standard deviation) or as a percentage.