Table 2.
Evaluation of New PrEP-Related Measures in a Sample of Men and Transgender Women and Men (N = 476)
| PrEP Scale | Items |
α | CFA Fit, Exploratory Sample (n = 236) |
CFA Fit, Confirmatory Sample (n = 240) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Initial | Final | Χ2 (df) | RMSEA | CFI | TLI | Factor Loadings | Χ2 (df) | RMSEA | CFI | TLI | Factor Loadings | ||
| Knowledge | 18 | 13 | .90 | 97.00 (65)** | .05 | .99 | .99 | ≥.65, ps < .001 | 87.46 (65)* | .04 | .99 | .99 | ≥.63, ps < .001 |
| Attitudes | 18 | 5 | .79 | 2.12 (5) | .000 | 1.00 | 1.05 | ≥.58, ps < .001 | 3.93 (5) | .000 | 1.00 | 1.01 | ≥.63, ps < .001 |
| Stigma | 6 | 5 | .83 | 8.03 (5) | .05 | .99 | .97 | ≥.44, ps < .001 | 7.04 (5) | .04 | .99 | .98 | ≥.36, ps < .001 |
| Descriptive Norms | 6 | 6 | .93 | 5.16 (5) | .01 | 1.00 | .999 | ≥.81, ps < .001 | 2.53 (5) | .000 | 1.00 | 1.02 | ≥.83, ps < .001 |
| Subjective Norms | 11 | 6 | .94 | 7.72 (8) | .000 | 1.00 | 1.00 | ≥.86, ps < .001 | 4.74 (8) | .000 | 1.00 | 1.04 | ≥.83, ps < .001 |
| Self-Efficacy | 11 | 8 | .87 | 65.99 (20)*** | .10 | .97 | .96 | ≥.69, ps < .001 | 59.45 (20)*** | .09 | .98 | .97 | ≥.59, ps < .001 |
| Intentions | 4 | 3 | .90 | -- | -- | -- | -- | ≥.91, ps < .001 | -- | -- | -- | -- | ≥.90, ps < .001 |
* p < .05
** p < .01
*** p < .001
Notes. PrEP = Pre-Exposure Prophylaxis; CFA = confirmatory factor analysis; RMSEA = root-mean-square error of approximation; CFI = comparative fit index; TLI = Tucker-Lewis index.