Table 1.
Exploratory factor analysis and internal consistency reliability of the K-DSC-R
| |
|
Factors and item loadings |
||||||
|---|---|---|---|---|---|---|---|---|
| Item a | F1 | F2 | F3 | F4 | F5 | F6 | F7 | |
| 15 |
Burning pain: calves |
0.761 |
0.108 |
0.103 |
0.131 |
0.004 |
−0.124 |
0.176 |
| 21 |
Shooting pain: legs |
0.747 |
0.200 |
0.068 |
0.095 |
0.180 |
0.096 |
0.068 |
| 25 |
Burning pain: legs |
0.726 |
0.256 |
0.092 |
0.115 |
0.054 |
−0.038 |
0.139 |
| 34 |
Tingle/prickle: legs or feet |
0.683 |
−0.112 |
0.077 |
0.016 |
0.003 |
0.151 |
0.203 |
| 11 |
Tingle: limbs |
0.637 |
0.240 |
0.054 |
0.074 |
0.106 |
0.234 |
−0.023 |
| 26 |
Tingle/prickle: hands or fingers |
0.581 |
0.046 |
0.104 |
0.007 |
0.085 |
0.280 |
0.077 |
| 4 |
Overall fatigue |
0.202 |
0.754 |
0.205 |
0.109 |
0.185 |
0.081 |
0.148 |
| 1 |
Energy |
0.130 |
0.725 |
0.154 |
0.142 |
0.112 |
0.077 |
0.202 |
| 20 |
Fatigue: when getting up |
0.157 |
0.620 |
0.339 |
0.121 |
0.135 |
0.102 |
−0.011 |
| 6 |
Sleepiness |
0.049 |
0.601 |
0.186 |
0.236 |
0.138 |
0.072 |
−0.073 |
| 17 |
Fatigue: daytime |
0.190 |
0.536 |
0.222 |
0.177 |
0.273 |
0.206 |
0.086 |
| 27 |
Irritation |
0.112 |
0.118 |
0.692 |
0.143 |
0.118 |
0.321 |
0.027 |
| 19 |
Irritability: before a meal |
0.080 |
0.202 |
0.688 |
0.053 |
0.109 |
0.072 |
−0.011 |
| 7 |
Concentration |
0.128 |
0.384 |
0.667 |
0.283 |
0.141 |
−0.073 |
0.148 |
| 8 |
Mood |
0.102 |
0.213 |
0.606 |
0.208 |
0.094 |
0.295 |
0.081 |
| 33 |
Attention |
0.114 |
0.199 |
0.599 |
0.232 |
0.105 |
0.048 |
0.257 |
| 14 |
Vision: getting worse |
0.042 |
0.155 |
0.196 |
0.773 |
0.129 |
0.097 |
−0.034 |
| 10 |
Vision: blurred |
0.113 |
0.224 |
0.057 |
0.759 |
0.111 |
0.229 |
0.193 |
| 28 |
Vision: sudden deterioration |
0.111 |
0.159 |
0.292 |
0.730 |
0.039 |
−0.113 |
0.084 |
| 22 |
Vision: alternating clear and blurred |
0.126 |
0.131 |
0.134 |
0.719 |
0.136 |
0.232 |
0.144 |
| 32 |
Drinking |
0.056 |
0.121 |
0.058 |
0.073 |
0.801 |
0.046 |
−0.083 |
| 12 |
Thirsty |
0.150 |
0.165 |
0.238 |
0.063 |
0.752 |
0.125 |
0.194 |
| 16 |
Dry mouth |
0.031 |
0.191 |
0.138 |
0.044 |
0.729 |
0.201 |
0.249 |
| 23 |
Urination |
0.105 |
0.138 |
0.054 |
0.182 |
0.689 |
−0.029 |
−0.044 |
| 13 |
Palpitations: heart |
0.100 |
0.192 |
0.141 |
0.082 |
0.065 |
0.769 |
0.091 |
| 24 |
Pain: chest |
0.184 |
0.012 |
0.212 |
0.161 |
0.195 |
0.675 |
0.020 |
| 30 |
Breath: shortness |
0.232 |
0.401 |
0.096 |
0.178 |
0.191 |
0.508 |
0.240 |
| 3 |
Numbness: feet |
0.284 |
0.110 |
0.106 |
0.121 |
0.106 |
0.045 |
0.796 |
| 9 |
Numbness: hands |
0.259 |
0.117 |
0.138 |
0.155 |
0.050 |
0.154 |
0.718 |
| Cronbach’s alpha | 0.81 | 0.82 | 0.81 | 0.83 | 0.79 | 0.66 | 0.71 | |
aOnly the main expression items are presented.
Values in boldface are meaningful factor loadings (≥0.50).
F1, neuropathic pain factor; F2, psychological fatigue factor; F3, hypoglycemic factor; F4, ophthalmologic factor; F5, hyperglycemic factor; F6, cardiovascular factor; F7, sensory neuropathic factor.