Table 2.
Exploratory factor analysis with direct oblimin rotation and the factor structure of MIQ-T in patients (n = 309) (items in English).
| Item (English) | Factor 1 | Factor 2 | Factor 3 | Factor 4 | Factor 5 |
|---|---|---|---|---|---|
| Factor #1—Lability | |||||
| When I have a lot of free time, my moods become unstable. | 0.759 | 0.123 | −0.047 | −0.030 | −0.024 |
| When I have a lot of free time, I feel depressed. | 0.722 | −0.003 | 0.026 | −0.076 | 0.048 |
| When I have a lot of free time, I feel irritable. | 0.695 | −0.103 | 0.039 | −0.113 | 0.125 |
| I constantly switch from being lively and sluggish. | 0.669 | 0.164 | 0.156 | 0.047 | −0.180 |
| When something good happens, I feel irritable. | 0.666 | −0.160 | −0.053 | 0.015 | 0.345 |
| I get sudden shifts in mood and energy. | 0.641 | 0.204 | 0.165 | 0.048 | −0.249 |
| When I have a lot of free time, I feel anxious. | 0.634 | −0.173 | 0.145 | −0.014 | 0.177 |
| When something good happens, I feel despondent. | 0.630 | −0.289 | −0.031 | −0.066 | 0.320 |
| The way I see things is sometimes vivid, but at other times lifeless. | 0.628 | 0.181 | 0.121 | 0.010 | −0.088 |
| My ability to think varies greatly from sharp to dull for no apparent reason. | 0.611 | 0.039 | 0.138 | 0.042 | −0.092 |
| My need for sleep varies a lot from just a few hours to more than 9 hours. | 0.593 | 0.108 | −0.016 | 0.081 | −0.086 |
| When something good happens, my moods becomes unstable. | 0.590 | −0.013 | 0.020 | 0.137 | 0.184 |
| My mood often changes for no reason. | 0.588 | 0.059 | 0.230 | 0.042 | −0.156 |
| I can really like someone a lot and then completely lose my interest in them. | 0.582 | 0.141 | 0.035 | 0.045 | −0.047 |
| My moods and energy are either high or low, rarely in between. | 0.570 | 0.054 | 0.149 | 0.159 | −0.236 |
| I go back and forth between being outgoing and being withdrawn from others. | 0.540 | 0.147 | 0.063 | 0.128 | −0.065 |
| When something good happens, I feel anxious. | 0.519 | −0.365 | 0.172 | 0.109 | 0.335 |
| My attitudes about myself changes a lot. | 0.518 | 0.268 | 0.094 | 0.149 | −0.116 |
| I sometimes go to bed feeling great and wake up in the morning feeling like life is not worth living. | 0.503 | −0.266 | 0.291 | 0.121 | −0.148 |
| My mood shifts very suddenly. | 0.489 | 0.232 | 0.121 | 0.202 | −0.290 |
| Sometimes, I feel terribly empty inside. | 0.484 | −0.022 | 0.270 | 0.201 | −0.081 |
| I daydream a great deal about things that other people consider impossible to achieve. | 0.479 | 0.158 | −0.025 | 0.159 | 0.081 |
| I go back and forth between feeling overconfident and feeling unsure of myself. | 0.448 | 0.121 | 0.167 | 0.203 | −0.123 |
| I often feel tired for no reason. | 0.448 | −0.081 | 0.341 | 0.115 | −0.022 |
| When I am busy, I feel more energetic. | 0.413 | 0.317 | −0.372 | −0.058 | −0.033 |
| I am the kind of person who can be sad and happy at the same time. | 0.402 | 0.164 | −0.062 | 0.057 | 0.042 |
| Factor #2—Upward Tendency | |||||
| When I get something I want, I feel excited and energized. | −0.041 | 0.742 | 0.073 | 0.023 | 0.058 |
| When good things happen to me, it affects me strongly. | 0.037 | 0.696 | 0.112 | −0.034 | 0.068 |
| When I see an opportunity for something I like, I get excited right away. | −0.043 | 0.669 | 0.085 | 0.204 | 0.140 |
| It would excite me to win a contest. | 0.019 | 0.575 | −0.031 | 0.052 | 0.098 |
| I often act on the spur of the moment. | 0.135 | 0.556 | 0.001 | 0.257 | 0.026 |
| When something good happens, I feel intensely euphoric. | 0.207 | 0.530 | 0.040 | 0.051 | −0.012 |
| Factor #3—Downward Tendency | |||||
| When I experience something difficult, I feel anxious. | 0.106 | 0.102 | 0.671 | −0.006 | 0.011 |
| When I experience something difficult, I get depressed easily. | 0.157 | 0.044 | 0.670 | 0.039 | −0.043 |
| Criticism or scolding hurts me quite a bit. | −0.096 | 0.360 | 0.616 | −0.138 | 0.062 |
| When I am busy, I feel anxious. | 0.044 | −0.085 | 0.608 | 0.064 | 0.352 |
| I feel pretty worried or upset when I think or know somebody is angry at me. | −0.052 | 0.374 | 0.593 | −0.209 | 0.051 |
| When I experience something difficult, I am more likely to get irritable. | 0.047 | 0.103 | 0.581 | 0.174 | 0.052 |
| I am able to adapt to change. * | 0.060 | −0.138 | 0.557 | −0.044 | −0.179 |
| I can handle unpleasant and painful feelings, such as sadness, fear, and anger. * | 0.155 | −0.041 | 0.550 | 0.049 | −0.147 |
| I get stressed by minor changes in my daily life. | 0.336 | −0.020 | 0.534 | −0.007 | 0.031 |
| When I experience something difficult, my moods become unstable. | 0.328 | 0.159 | 0.532 | 0.005 | −0.018 |
| When I am busy, I feel depressed. | 0.035 | −0.129 | 0.526 | 0.024 | 0.389 |
| Even when I am under pressure, I can focus and think clearly. * | 0.101 | −0.078 | 0.524 | 0.199 | −0.234 |
| When I am busy, I easily get irritable. | 0.032 | 0.037 | 0.515 | 0.184 | 0.303 |
| I am an insecure person. | 0.397 | −0.130 | 0.491 | 0.154 | −0.123 |
| I am told that I often get pessimistic about things and forget previous happy times. | 0.220 | −0.173 | 0.485 | 0.247 | −0.025 |
| My mood is very steady. * | 0.320 | −0.110 | 0.448 | 0.105 | −0.258 |
| If I think something unpleasant is going to happen, I usually get pretty "worked up". | 0.112 | 0.378 | 0.435 | −0.052 | 0.130 |
| When I am busy, my moods become unstable. | 0.231 | 0.096 | 0.419 | 0.105 | 0.312 |
| Factor #4—Childhood Instability | |||||
| As a child, I was hot- or short-tempered, with a low boiling point. | −0.134 | 0.057 | −0.036 | 0.862 | 0.071 |
| As a child, I acted without thinking and I was impulsive. | −0.099 | 0.053 | −0.088 | 0.835 | 0.014 |
| As a child, I was moody with ups and downs. | 0.035 | 0.021 | −0.060 | 0.822 | 0.121 |
| As a child, I lost control of myself. | 0.006 | −0.028 | −0.081 | 0.765 | 0.109 |
| As a child, I had temper outbursts and tantrums. | −0.025 | −0.005 | −0.011 | 0.705 | −0.010 |
| My relationships have been stormy. | 0.099 | −0.091 | 0.353 | 0.418 | −0.160 |
| Factor #5—Seasonality | |||||
| How much do you experience seasonal variation in energy? | 0.023 | 0.236 | −0.025 | 0.151 | 0.555 |
| How much do you experience seasonal variation in mood? | 0.061 | 0.285 | 0.019 | 0.122 | 0.523 |
| How much do you experience seasonal variation in social activity? | −0.015 | 0.215 | 0.071 | 0.136 | 0.522 |
Notes: Factor loadings with absolute value greater than 0.40 are shown in bold. * indicates items that were reverse-coded. Extraction Method: Principal Component Analysis. Extraction Method: Oblimin with Kaiser normalization.