Table 2 Corrected item to total correlations for the Symptom Inventory Total Score and the Symptom Inventory Short-Form Score
From: Psychometric properties of the CDC Symptom Inventory for assessment of Chronic Fatigue Syndrome
| Symptom | Corrected item to total correlations | |
|---|---|---|
| Total score | Short-form score | |
| Sore throat | .43 | |
| Tender nodes | .48 | |
| Diarrhea | .37 | |
| Unusual fatigue after exertion | .69 | .64 |
| Muscle aches | .70 | .64 |
| Joint pain | .54 | |
| Feverishness | .28 | |
| Chills | .52 | |
| Unrefreshing sleep | .77 | .79 |
| Sleeping problems | .65 | .70 |
| Headaches | .43 | |
| Memory problems | .62 | .66 |
| Concentration | .59 | .67 |
| Nausea | .40 | |
| Stomach pain | .32 | |
| Sinus problems | .51 | |
| Shortness of breath | .41 | |
| Sensitivity to light | .41 | |
| Depression | .52 | |