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Table 3 Frequency of item administration in simulated computerized adaptive testing, by level of fatigue

From: Validity assessment of the PROMIS fatigue domain among people living with HIV

Item Overall (n = 1597) Fatigue score
≤40 (n = 246) >40–50 (n = 561) >50–60 (n = 556) >60 (n = 234)
How often did you feel tired? 22.0 100.0 18.4 0.0 1.3
How often did you run out of energy? 57.5 100.0 54.2 45.9 48.7
How often were you too tired to take a bath or shower? 6.6 43.1 0.0 0.0 0.0
How often did you experience extreme exhaustion? 7.3 45.9 0.0 0.0 1.7
How often did your fatigue limit you at work (including work at home)? 8.9 57.7 0.0 0.0 0.0
How often were you too tired to think clearly? 7.8 45.9 0.0 0.0 4.7
How often did you have enough energy to exercise strenuously? 8.7 56.5 0.0 0.0 0.0
How often were you physically drained? 99.7 100.0 100.0 100.0 97.9
To what degree did you have to force yourself to get up and do things? 79.8 46.7 69.5 100.0 91.5
How run-down did you feel on average? 100.0 100.0 100.0 100.0 100.0
How fatigued were you on average? 100.0 100.0 100.0 100.0 100.0
How fatigued were you when your fatigue was at its worst? 11.6 75.2 0.0 0.0 0.0
To what degree did your fatigue interfere with your physical functioning? 70.6 49.6 38.3 100.0 100.0
I felt fatigued 47.3 64.2 82.7 22.1 4.3
I had trouble starting things because I was tired 20.5 48.0 0.0 35.1 6.0
How much were you bothered by your fatigue on average? 85.2 85.4 75.6 89.9 97.0
How often did you wake up feeling exhausted? 7.6 49.2 0.0 0.0 0.0
How often did you feel so exhausted that you stayed in bed all day? 6.9 44.7 0.0 0.0 0.0
How often were you too exhausted to take your medication? 6.2 40.2 0.0 0.0 0.0
How often were you so exhausted that you missed appointments? 6.6 42.7 0.0 0.0 0.0
How often were you too exhausted to carry out your daily responsibilities? 7.0 43.9 0.0 0.0 1.7
How often did your body feel exhausted? 46.1 100.0 61.3 7.0 46.2
How often were you too exhausted to chew and swallow food? 6.1 39.8 0.0 0.0 0.0
How often were you too exhausted to concentrate? 7.0 45.5 0.0 0.0 0.0
Mean number of items 8.3 15.2 7.0 7.0 7.0
Mean standard error of measurement (T-metric) 2.2 3.2 2.1 2.0 2.1