Table 2.
Symptom analyses.
| Symptom | 1997-1998 Survey N (%) | 2013-2017 Survey N (%) | Difference in prevalence (%) | OR [CI] | P-value |
|---|---|---|---|---|---|
| Fatigue Symptoms | |||||
| Fatigue or easily tired/overly tired or lack of energy | 170 (53.6) | 199 (62.8) | 9.2 | 1.486 [1.155-1.913] | .002 |
| Restless or unsatisfying sleep/restless sleep | 170 (53.6) | 228 (71.9) | 18.3 | 2.319 [1.747-3.078] | .000 |
| Mood & Cognition Symptoms | |||||
| Frequent periods of feeling depressed/depressed mood | 102 (32.2) | 172 (54.3) | 22.1 | 2.608 [1.957-3.474] | .000 |
| Difficulty Concentrating | 124 (39.1) | 174 (54.9) | 15.8 | 1.987 [1.508-2.617] | .000 |
| Crying Easily | 47 (14.8) | 64 (20.2) | 5.4 | 1.462 [1.002-2.132] | .049 |
| Frequent periods of anxiety or nervousness/nervousness, tenseness, or anxiousness | 95 (30.0) | 190 (59.9) | 29.9 | 3.758 [2.800-5.044] | .000 |
| Forgetfulness | 176 (55.5) | 190 (59.9) | 4.4 | 1.245 [0.949-1.632] | .113 |
| Confusion | 59 (18.6) | 89 (28.1) | 9.5 | 1.817 [1.312-2.517] | .000 |
| Difficulty Learning New Material | 64 (20.2) | 93 (29.3) | 9.1 | 1.684 [1.223-2.318] | .001 |
| Neurological OR Physical Symptoms | |||||
| Joint Pain | 167 (52.7) | 233 (73.5) | 20.8 | 2.696 [2.052-3.542] | .000 |
| Common Cold or Flu | 112 (35.3) | 80 (25.2) | −10.1 | 0.598 [0.438-0.816] | .000 |
| Dizziness or feeling lightheaded/faintness or dizziness | 88 (27.8) | 77 (24.3) | −3.5 | 0.856 [0.630-1.164] | .321 |
| Hands sweating and feeling clammy | 41 (12.9) | 39 (12.3) | −0.6 | 0.959 [0.678-1.358] | .815 |
| Headaches | 142 (44.8) | 147 (46.4) | 1.6 | 1.083 [0.838-1.401] | .541 |
| Muscle Twitching/Trembling | 98 (30.9) | 145 (45.7) | 14.8 | 1.954 [1.518-2.515] | .000 |
| Racing heart/rapid heart beat | 39 (12.3) | 87 (27.4) | 15.1 | 2.993 [2.046-4.378] | .000 |
| Skin Rash | 93 (29.3) | 96 (30.3) | 1.0 | 1.070 [0.792-1.444] | .660 |
| Nausea | 95 (30.0) | 106 (33.4) | 3.4 | 1.206 [0.902-1.611] | .206 |
| Stomach cramping or excessive gas | 129 (40.7) | 137 (43.2) | 2.5 | 1.098 [0.8917-1.476] | .533 |
| Rapid Breathing | 33 (10.4) | 45 (14.2) | 3.8 | 1.509 [0.977-2.331] | .064 |
| Irregular heart beats or “heart flutters”/irregular heart rate | 38 (12.0) | 48 (15.1) | 3.1 | 1.371 [0.932-2.018] | .109 |
| Diarrhea or constipation/diarrhea | 108 (34.1) | 110 (34.7) | 0.6 | 1.051 [0.796-1.388] | .725 |
| Numbness in arms or legs/numbness or tingling in parts of the body | 84 (26.5) | 167 (52.7) | 26.2 | 3.234 [2.398-4.361] | .000 |
| Backaches | 154 (48.6) | 210 (66.2) | 17.6 | 2.077 [1.596-2.703] | .000 |
| Difficulty Breathing/Catching your breath | 79 (24.9) | 106 (33.4) | 8.5 | 1.582 [1.180-2.121] | .002 |
1997-1998 Survey wording/2013-2017 Survey wording.
Analyses included Baseline Age and Baseline PTSD Status as covariates.