Table 4

Thirty-day serious outcomes for each Canadian Syncope Risk Score category

Risk category
(score)
N (%)All deaths*Arrhythmic outcomesNon-arrhythmic outcomes*All outcomes*
Death from unknown cause*Ventricular arrhythmia*Non-ventricular arrhythmia*
Very low (−3 to –2)3585 (43.6)1 (0.0)0 (0.0)0 (0.0)4 (0.1)6 (0.2) 10 (0.3)
Low (−1 to 0)2643 (32.1)0 (0.0)0 (0.0)0 (0.0)10 (0.4)17 (0.6) 27 (1.0)
Medium (+1 to +3)1483 (18.0)10 (0.7)6 (0.4)9 (0.6)64 (4.3)37 (2.5) 116 (7.8)
High (+4 to +5)364 (4.4)13 (3.6)10 (2.7)9 (2.5)36 (9.9)23 (6.3) 78 (21.4)
Very high (+6 to +11)150 (1.8)10 (6.7)7 (4.7)10 (6.7)38 (25.3)9 (6.0) 64 (42.7)
Total 8,225† 34 (0.4) 23 (0.3) 28 (0.3) 152 (1.8) 92 (1.1) 295 (3.6)
  • *Statistically significant difference (Cochrane-Armitage trend test p<0.001) in the overall proportion of patients suffering outcome and for each outcome type among the Canadian Syncope Risk Score categories.

  • †8225 patients had information for all the component CSRS predictors for the total score calculation. The score could not be calculated for eight patients because of missing CSRS predictors and none had an occult serious condition identified.

  • CSRS, Canadian Syncope Risk Score.