Table. Demographic and Clinical Characteristics of the Study Participants.
| Characteristic | No. (%) | |||
|---|---|---|---|---|
| Anomalous health incidents | Present before anomalous health incidenta | Present during or after anomalous health incidenta | US government controls | |
| No. | 86 | 30 | ||
| Age, mean (SD), y | 42.1 (9.1) | 43.8 (10.1) | ||
| Sex | ||||
| Female | 42 (49) | 11 (37) | ||
| Male | 44 (51) | 19 (63) | ||
| Education from first grade, median (IQR), y | 17 (16-18) | 18 (16-18) | ||
| US government employee family member | 10 (12) | NA | ||
| Reduced capacity and/or unable to work due to anomalous health incidents | 28 (33) | NA | ||
| Time from the most recent incident to evaluation, median (IQR), d | 76 (30-537) | NA | ||
| Sound or pressure | 70 (81) | NA | ||
| Directionality and/or locality | 59 (69) | NA | ||
| Symptomsb | ||||
| Headache | 35 (41) | 64 (74) | 12 (40) | |
| Sleep dysfunction | 12 (18) | 49 (59) | 1 (3) | |
| Depression | 11 (13) | 16 (19)c | 0c | |
| Vision changes | 10 (12) | 32 (37) | 0 | |
| Posttraumatic stress disorder | 8 (9) | 9 (11)c | 0c | |
| Imbalance | 4 (5) | 45 (52) | 0 | |
| Cognitive | 1 (1) | 59 (69) | 0 | |
| Dizziness | 1 (1) | 32 (37) | 0 | |
| Diagnoses | ||||
| Migraine headache | 23 (27) | 31 (36) | 2 (7) | |
| Tinnitus | 14/85 (16) | 48 (56) | 0 | |
| Peripheral neuropathy | 11/83 (13) | 13/84 (15) | 0 | |
| Cranial neuropathy | 5/85 (6) | 7 (8) | 0 | |
| Headache, unspecified | 4 (5) | 16 (19) | 12 (40) | |
| Cancer | 3 (4) | 5 (6) | 0 | |
| Strabismus | 2/84 (2) | 4/85 (5) | 0 | |
| Seizure disorder | 1 (1) | 1 (1) | 1 (3) | |
| Functional neurological disorder | 1 (1) | 24 (28) | 0 | |
| Current cataract | 1/76 (1) | 21/84 (25) | 0 | |
| Benign paroxysmal positional vertigo | 1 (1) | 3 (3) | 0 | |
| New daily persistent headache | 0 | 25 (29) | 0 | |
| Tension-type headache | 0 | 3 (3) | 0 | |
Abbreviation: NA, not applicable.
a
Data in these columns are not mutually exclusive. If a participant had symptoms or diagnosis before the anomalous health incident and continued to have it after the anomalous health incident, they are counted in both columns.
b
Based on history and physical examination.
c
Based on screening instruments.