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Table 1 Patient characteristics, biomarker values and brain imaging type in patients with or without stroke as the main cause of a new episode of dizziness

From: Value of copeptin and the S-100b protein assay in ruling out the diagnosis of stroke-induced dizziness pattern in emergency departments

  Stroke
(n = 13)
No stroke
(n = 122)
P value
Age (yrs) 70 [62–78] 60 [42–71] 0.023
Male sex 6 (46) 51 (42) 0.76
Delay between dizziness onset and ED visit (h) 12 [8.5–30] 12 [6–24] 0.395
Clinical data
 Positive HINT maneuvers 5 (38.5) 29 (24) 0.246
 Positive nystagmus test 5 (38.5) 28 (3) 0.216
 Positive HIT test 1 (7) 10 (8) 1
 Positive skew test 1 (7) 1 (1) 0.184
Biomarker data
 Copeptin value (μmol/L) 70 [13.5–141] 10.5 [4–31] 0.065
 Copeptin >normal value 10 (76) 61 (50) 0.002
 S100 protein value (pmol/L) 0.11 [0.04–0.65] 0.05 [0.04–0.06] < 0.0001
 S100 protein >normal value 7 (54) 4 (3) 0.002
Brain imaging
 Tomodensitometry 5 (38) 6 (5) 0.001
 Magnetic resonance imaging 3 (23) 71 (58) 0.02
 Both 5 (38) 45 (37) 0.91
  1. Results are expressed as median [Interquartile range] or number (percentage)