Table 2. Results of univariate meta-regression1.
| Variable | Category 1 | Category 2 | Point | Standard | 95% CI | Z | τ2 |
|---|---|---|---|---|---|---|---|
| (k, N)2 | (k, N) | estimate | error | ||||
| Country | USA = 0 | Other = 1 | -.132 | .115 | -.358; .094 | -1.147 | .624 |
| (37, 22681) | (6, 3662) | ||||||
| Year of publication | 1994–2014 | .034 | .024 | -.013; .080 | 1.420 | .626 | |
| (43, 26343) | |||||||
| Clinical cut-offs | 4–70 | -.001 | .007 | -.014; .014 | -.001 | .634 | |
| (43, 26343) | |||||||
| Sample size3 | 33–5000 | -.001 | .001 | -.001; -.000 | -3.835*** | .407 | |
| (43, 26343) | |||||||
| M Age, years | 18–30 | -.019 | .023 | -.064; .026 | -.821 | .610 | |
| (40, 25670) | |||||||
| Female% | 37–100 | .015 | .010 | -.004; .034 | 1.570 | .630 | |
| (43, 17044) | |||||||
| Male% | 0–63 | -.015 | .010 | -.034; .004 | -1.571 | .630 | |
| (43, 9299) | |||||||
| White/Caucasian% | 0–94 | -.002 | .004 | -.010; .006 | -.530 | .631 | |
| (37,17940) | |||||||
| Black/African% | 0–37.1 | -.005 | .014 | -.033; .023 | -.352 | .632 | |
| (36, 2028) | |||||||
| Hispanic/Latin% | 0–14 | .025 | .032 | -.038; .088 | .768 | .635 | |
| (36, 1001) | |||||||
| Asian%3 | 0–100 | -.018 | .007 | -.032; .005 | -2.61** | .601 | |
| (36, 2292) | |||||||
| Other%3 | 0–100 | .018 | .007 | .003; .032 | 2.42* | .564 | |
| (36, 3082) |
Note.
* p < .05
** p < .01
*** p < .001
1 Results from Mixed effects regression (Method of Moments)
2 Significant (p < .05) results shown in bold
3 k = number of studies; N = total sample size