From: Development and validation of the patient-rated ulnar nerve evaluation
Items on baseline longer version of PRUNE (before final item reduction) | Subscale | Explanation of final decisions on items deleted from the final scale during production processes | |||
---|---|---|---|---|---|
 | Pain | Usual activity /role | Specific activity | Sensory/motor symptoms |  |
Variance Explained by factor (%) | 24 | 15 | 26 | 10 | Although some items cross loaded as below; the largest amount of variance was by specific activity items; followed by pain, usual activity and sensory/motor symptoms |
Pain - At its worst | 0.86 | 0.12 | 0.26 | 0.12 | Â |
Pain - At Rest | 0.76 | 0.21 | 0.36 | 0.02 | Â |
Pain - Morning | 0.74 | 0.28 | 0.33 | 0.26 | Â |
Pain - During activity | 0.70 | 0.29 | 0.51 | 0.26 | Pain during activity was dropped from the reduced measure |
Pain - After activity | 0.85 | 0.15 | 0.24 | 0.19 | Â |
Pain - At night | 0.83 | 0.20 | 0.25 | 0.02 | Â |
Pain - Frequency | 0.89 | 0.19 | 0.11 | 0.16 | Â |
SM - Numbness | 0.37 | 0.74 | −0.02 | 0.24 | Hand weakness cross loads but left as a component of sensory/motor symptoms scale given importance. Motor Control item clarified based on respondent feedback |
SM - Pins And needles | 0.27 | 0.76 | 0.18 | −0.04 | |
SM - Control finger | 0.14 | 0.78 | 0.23 | 0.13 | |
SM - Weakness in hand | 0.46 | 0.47 | 0.06 | 0.46 | Â |
SA - Combing hair | 0.32 | 0.25 | 0.78 | 0.29 | Hair combing deleted: not applicable to a number of respondents |
SA - Eating | 0.15 | 0.40 | 0.67 | 0.30 | Â |
SA - Lift heavy object | 0.34 | 0.18 | 0.72 | 0.31 | Â |
SA - Finger task | 0.49 | 0.04 | 0.66 | 0.37 | Â |
SA - Pull | 0.43 | 0.12 | 0.39 | 0.52 | Pulling deleted due to cross loading and correlation with heavy lifting |
SA - Throw a small object | 0.32 | 0.10 | 0.81 | 0.24 | Throwing deleted due to higher rate of missingness |
SA - Use a telephone | 0.39 | 0.00 | 0.73 | 0.26 | Â |
SA - Doing up buttons | 0.12 | 0.25 | 0.59 | 0.21 | Doing buttons and washing deleted based on cross correlations and interviews |
SA - Wash opposite armpit | 0.30 | 0.11 | 0.73 | 0.26 | |
SA - Reaching | 0.35 | 0.01 | 0.82 | 0.15 | Â |
SA - Turning a doorknob | 0.19 | 0.08 | 0.69 | 0.45 | Â |
UA - Personal care | −0.02 | 0.06 | 0.40 | 0.60 |  |
UA - Household | 0.11 | 0.14 | 0.41 | 0.68 | Â |
UA - Work | 0.14 | 0.08 | 0.27 | 0.85 | Â |
UA - Recreational activities | 0.22 | 0.12 | 0.37 | 0.77 | Â |