Table 2.
Sociodemographic characteristics of healthy adult participants across sites
| Site | F/χ2 | p | Post hoc a | |||||
|---|---|---|---|---|---|---|---|---|
| Brazil | India | Netherlands | South Africa b | United States | ||||
| N | 53 | 50 | 50 | 52 | 51 | |||
| Mean age (SD) | 31.96 (7.49) | 27.70 (5.08) | 32.70 (9.71) | 29.79 (9.36) | 27.82 (7.16) | 4.27 | 0.002 | Netherlands > India |
| Sex (% male) | 20 (37.7%) | 27(54.0%) | 23 (46.0%) | 18 (34.6%) | 20 (39.2%) | 5.00 | 0.29 | |
| Mean WAMI (SES) (SD) | 0.73 (0.09) | 0.68 (0.11) | 0.82 (0.07) | 0.77 (0.09) | 0.83 (0.06) | 28.76 | <0.001 | United States = Netherlands > Brazil = India; Netherlands = South Africa; United States > South Africa > India |
| Mean education (SD) | 17.11 (2.59) | 15.92 (2.16) | 15.86 (2.86) | 14.79 (2.45) | 16.55 (1.68) | 6.96 | <0.001 | Brazil = United States > South Africa |
Abbreviations: χ2, chi-square; F, ANOVA F statistic; SD, standard deviation; SES, socioeconomic status derived from WAMI.
a
Sites shown with = indicate they were not significantly different at p < 0.05. Sites shown with > indicate significant difference at p < 0.05.
b
One participant at South Africa did not have intelligence scores and was dropped from further analyses.