| EHS (n = 47) | ERM (n = 13) | Total (n = 60) | P-value | ||||
---|---|---|---|---|---|---|---|---|
Tbody (°C) | 40.6 (39.0–42.7) | 37.3 (36.8–38.2) | 40.4 (36.8–42.7) | < 0.001 | ||||
Measurement method (n (%)) |  |  |  | < 0.001 | ||||
 Tympanic membrane | 28 (60) | 0 | 28 (47) |  | ||||
 Rectal | 11 (23) | 0 | 11 (18) |  | ||||
 Not reported | 8 (17) | 6 (46) | 14 (23) |  | ||||
First measurement (n (%)) | Â | Â | Â | 0.63 | ||||
 On site | 28 (60) | – | 28 (47) |  | ||||
 On hospital arrival | 11 (23) | 2 (15) | 13 (21) |  | ||||
 Not reported | 8 (17) | 4 (31) | 12 (20) |  | ||||
Tbody not measured (n (%)) | – | 7 (54) | 7 (12) |  | ||||
Symptoms during the event | Yes | No | Yes | No | Yes | No | NR | Â |
CNS dysfunction (n) | Â | Â | Â | Â | Â | Â | Â | Â |
 Amnesia | 11 | 2 | 1 | 1 | 12 | 3 | 45 | 0.37 |
 Ataxia | 29 | 15 | 2 | 9 | 31 | 24 | 5 | 0.006 |
 Collapse | 42 | 4 | 2 | 11 | 44 | 15 | 1 | 0.050 |
 Confusion | 15 | 2 | 1 | 1 | 16 | 3 | 41 | 0.40 |
 Hyperactive state | 5 | 2 | 1 | 1 | 6 | 3 | 51 | 1.00 |
 Hypoactive state | 9 | 3 | 1 | 1 | 10 | 4 | 46 | 0.51 |
 Seizure | 8 | 26 | 1 | 11 | 9 | 37 | 14 | 0.41 |
 Speech disorder | 4 | – | 1 | 2 | 5 | 2 | 53 | 0.14 |
Muscular symptoms (n) | Â | Â | Â | Â | Â | Â | Â | Â |
 Myalgia | 26 | 13 | 12 | 1 | 38 | 14 | 8 | 0.15 |
 Muscle cramps | 24 | 19 | 13 | – | 37 | 19 | 4 | 0.002 |
 Muscle swelling | 2 | 22 | 9 | 3 | 11 | 25 | 24 | < 0.001 |
 Muscle weakness | 23 | 14 | 7 | 4 | 30 | 18 | 12 | 1.00 |
 Myoglobinuria* | 1 | – | 4 | 4 | 5 | 4 | 51 | 1.00 |
Other (n) | Â | Â | Â | Â | Â | Â | Â | Â |
 Dizziness | 38 | 6 | 6 | 5 | 44 | 11 | 5 | 0.032 |
 Headache | 27 | 16 | 7 | 6 | 34 | 22 | 4 | 0.75 |
 Nausea | 29 | 18 | 6 | 7 | 35 | 25 | – | 0.36 |
Laboratory results | Â | Â | Â | Â | Â | Â | Â | Â |
 Peak CK (IU/l) | 419 (129–1,502,600) | 17,000 (2158–75,720) | 2229 (129–1,502,600) | < 0.001 | ||||
  NR (n (%)) | 20 (43) | 0 | 20 (33) |  | ||||
 BUN (mg/dl) | 19.6 (12.6–51.0) | 18.2 (7.8–33.0) | 19.3 (7.8–51.0) | 0.74 | ||||
  NR (n (%)) | 23 (49) | 10 (77) | 33 (55) |  | ||||
 Creatinine (mg/dl) | 1.47 (0.89–4.59) | 0.98 (0.64–1.89) | 1.42 (0.64–4.59) | 0.005 | ||||
  NR (n (%)) | 18 (38) | 6 (46) | 24 (40) |  | ||||
 BUN/creatinine ratio | 12.6 (7.7–18.4) | 14.1 (12.2–17.5) | 12.0 (7.7–18.4) | 0.39 | ||||
  NR (n (%)) | 23 (49) | 10 (77) | 33 (55) |  | ||||
 Sodium (mEq/l) | 145 (135–150) | 142 (135–144) | 144 (135–150) | 0.029 | ||||
  Sodium > 145 mEq/l (n (%)) | 16 (34) | 0 | 16 (27) | 0.046 | ||||
  NR (n (%)) | 18 (38) | 8 (62) | 26 (43) |  | ||||
 GFR (ml/min) | 55 (28–88) | 90 (46–90) | 58 (28–90) | 0.003 | ||||
  NR (n (%)) | 23 (49) | 6 (46) | 29 (48) |  |