TABLE 1.
Standardized factor loadings for eight-item and four-item scales from unidimensional CFAs
| Item | Factor loadings | SE | p value |
|---|---|---|---|
| I felt stressed. | .78/.79a | .03/.03 | <.001 |
| I felt that my problems kept piling up. | .85/.89 | .02/.02 | <.001 |
| I felt overwhelmed. | .84/.85 | .03/.03 | <.001 |
| I felt unable to manage things in my life. | .84/.80 | .02/.03 | <.001 |
| Everything bothered me (PPSM-8). | .75 | .03 | <.001 |
| I felt under pressure (PPSM-8). | .78 | .03 | <.001 |
| I had trouble concentrating (PPSM-8). | .73 | .03 | <.001 |
| I felt I had too much going on (PPSM-8). | .79 | .03 | <.001 |
| Confirmatory factor model fit | PPSM-8 | PPSM-4 | |
| χ2 (df) | 31.75* (20) | 1.52 (2) | — |
| CFI/FLI | .98/.98 | 1.00/1.00 | — |
| RMSEA | .05 | .00 | — |
| RMSEA 90% CI | 0.006–0.074 | 0.000–0.108 | |
| SRMR | .02 | .00 | — |
| AIC | 5,567.18 | 2,861.63 |
Note. AIC = Akaike information criterion; CFI = comparative fit index; CI = confidence interval; PPSM-8 = eight-item PPSM; PPSM-4 = four-item PPSM; PPSM = Pediatric Psychological Stress Measure; RMSEA = root mean square error of approximation; SRMR: standardized root mean square residual; TLI = Tucker-Lewis index.
a
In the factor loadings column of the table, the loadings of the PPSM-8 are listed before the slash sign and the loadings of the PPSM-4 are listed after the slash sign.
*
p < .05.