Table 1 Prevalence and Predicted Probabilities * of Nonsinus Tachycardia (NST) Based on Age and Heart Rate (HR)
From: Sinus versus nonsinus tachycardia in the emergency department: Importance of age and heart rate
Age (years) | Heart Rate (beats/min) | ||
|---|---|---|---|
100–120 (0 Points) | 121–140 (3 Points) | ≥141 (8 Points) | |
<50 (0 Points) | 0 Points | 3 Points | 8 Points |
Predicted Probability of NST | 3% | 13% | 62% |
Observed Probability of NST | 1% (1/77) | 13% (4/30) | 67%(6/9) |
51–70 (3 Points) | 3 Points | 6 Points | 11 Points |
Predicted Probability of NST | 13% | 39% | 86% |
Observed Probability of NST | 12%(14/114) | 40%(8/20)) | 75%(15/20) |
>71 (5 Points) | 5 Points | 8 Points | 13 Points |
Predicted Probability of NST | 28% | 62% | 93% |
Observed Probability of NST | 30%(50/165) | 59%(20/41) | 88(21/24) |