Table 3.
EFA, CFA, and PCA Results.
| Symptoms | EFA Factor Loading (50% of Sample; n = 237; Highest Values) | CFA (50% of EFA Sample; n = 237) Factor Loading (95% CI) | PCA Factor Loading |
|---|---|---|---|
| 1. Chest symptoms | |||
| chest discomfort | .866 | .721 [.628, .813] | −.744 |
| chest pressure | .465 | .582 [.491, .673] | −.650 |
| chest pain | .391 | .485 [.391, .578] | −.696 |
| 2. Exertion-like | |||
| lightheadedness | .546 | .594 [.506, .682] | .561 |
| fatigue | .427 | .586 [.506, .682] | .471 |
| palpitations | .455 | .442 [.347, .537] | .746 |
| shortness of breath | .420 | .479 [.386, .573] | .598 |
| 3. Pain non-chest | |||
| shoulder pain | .759 | .745 [.650, .842] | .752 |
| arm pain | −.565 | .555 [.464, .645] | .751 |
| upper back pain | −.363 | .443 [.346, .540] | .652 |
| 4. Gastrointestinal | |||
| nausea | .636 | .567 [.458, .676] | .730 |
| sweating | .387 | .471 [.367, .575] | .719 |
| indigestion | .355 | .432 [.327, .539] | .407 |
Note. EFA = exploratory factor analysis; CFA = confirmatory factor analysis; CI = confidence interval; PCA = principal component analysis.