Table 1.
Final Confirmatory Factor Models and Fit Indices of Latent Variables Using the 2003 U.S. Trial of Activity for Adolescent Girls Dataset (N=1,721)
| Variable: Final Model Description | # Items (# of factors) | χ2 (df) |
P value | CFI | RMSEA (CI) |
SRMR | Factor loadings | Factor & significant* item covariance | Alpha |
|---|---|---|---|---|---|---|---|---|---|
| Physical activity enjoyment | 5 (1) |
26.59 (4) |
<0.001 | 0.99 | 0.06 (0.04-0.08) |
0.01 | 0.69-0.81 | item 6&7=0.16 | 0.86 |
| Social support | 8 (2) |
181.69 (16) |
<0.001 | 0.96 | 0.08 (0.07-0.09) |
0.04 | Friends: 0.65-0.73 Family: 0.54-0.79 |
factors=0.65 items 2&5=0.18 items 3&6=0.16 items 4&9=0.23 |
Friends: 0.72 Family: 0.82 |
| School climate | 5 (2) |
7.51 (3) |
0.06 | 1.00 | 0.03 (0.00-0.06) |
0.01 | Teachers: 0.77-0.90 Boys: 0.62-0.73 |
factors=0.47 items 4&5= −0.33 |
Teachers:N/A Boys: 0.66 |
| Neighborhood environment | 8 (1) |
118.03 (13) |
<0.001 | 0.94 | 0.07 (0.06-0.08) |
0.03 | 0.40-0.55 |
items 4&5=0.17 items 4&8= −0.07 items 4&10=0.02 items 5&8=0.02 items 5&10=0.04 items 8&10=0.06 items 2&3=0.20 |
0.71 |
Note. TAAG: Trial of Activity for Adolescent Girls; χ2: Chi-square value (associated p value >0.05 indicates good model fit); df: degrees of freedom; CFI: Comparative Fit Index (value ≥0.95 indicates good model fit); RMSEA: Root Mean Square Error of Approximation (value ≤0.06 indicates good model fit); CI: Confidence interval; SRMR: Standardized Root Mean Square Residual (value ≤0.06 indicates good model fit); N/A: not applicable due to too few items to consider the factor a scale; Factor covariance indicates the correlation between the latent factors within each model when applicable; Item covariance indicates the error covariance between the items specified in the model
p<0.05