Table IV.
Factor Loadings Obtained from Confirmatory Factor Analysis (CFA) of the Nine Items Using One and Two Dimensions, Respectively
| Item | Factor loadings using 1 factor | Factor loadings using 2 factors | |
|---|---|---|---|
| Factor 1 | Factor 2 | ||
| IPSS1 | 0.756 | − 0.605 | 0.462 |
| IPSS2 | 0.702 | − 0.228 | 0.763 |
| IPSS3 | 0.709 | − 0.672 | 0.349 |
| IPSS4 | 0.662 | − 0.310 | 0.613 |
| IPSS5 | 0.683 | − 0.612 | 0.367 |
| IPSS6 | 0.600 | − 0.806 | 0.113 |
| IPSS7 | 0.459 | − 0.108 | 0.537 |
| Quality of Life (QoL) | 0.755 | − 0.313 | 0.752 |
| Summary BPH Impact Index (BIIsummary) | 0.686 | − 0.516 | 0.462 |
In the CFA with two factors, numbers in italic emphasize the largest factor loading value (covariance between each item and factor). Higher factor loadings indicate closer association with the factor
IPSS1, incomplete emptying; IPSS2, frequency; IPSS3, intermittency; IPSS4, urgency; IPSS5, weak stream; IPSS6, straining; IPSS7, nocturia