Table 3

Patient data: factor extraction decision¥
Components Eigen value Total variance (%) Extraction criteria Decision to extract
PA random eigen value (SD) Kaiser Scree test
Felt stigma
1 9.23 61.5 1.59 (0.07) Yes Yes Yes Yes
2 1.03 6.9 1.45 (0.05) No Yes No No
3 0.81 5.0 1.34 (0.04) No No No No
Enacted stigma
1 10.7 63.0 1.63 (0.07) Yes Yes Yes No
2 1.04 6.1 1.49 (0.05) No Yes No No
3 0.96 5.6 1.39 (0.04) No No No No

¥ The non rotated factor analysis provided the best fit to the data; Kaiser-Meyer-Olkin sampling adequacy equals 0.929 and 0.944 for perceived and enacted stigmas respectively; All anti-image matrices measures of sampling adequacy (MSA) were near or greater than 0.9 for both scales; Bartlett’s test of sphericity, p < 0.001 for both scales; ‘Yes’, indicates criteria is fulfilled, ‘No’ indicates otherwise. Kaiser recommends extracting factors with eigen value of ≥1; Scree (Cattel’s) test recommends extracting factors above the elbow of the scree plot. PA: parallel analysis.

Franklin et al.

Franklin et al. BMC Public Health 2013 13:298   doi:10.1186/1471-2458-13-298

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