Table 2

Respiratory status on presentation to the ED

PP present (n=78)PP absent (n=207)P value
Tachypnoea present76 (97.4%)201 (97.1%)1
Oxygen saturation
 ≥95%29 (37.2%)78 (37.7%)0.274
 92%–94%36 (46.1%)78 (37.7%)
 <92%13 (16.7%)51 (24.6%)
Median (IQR) PASS*5.00 (4.00–5.00)3.00 (3.00–5.00) <0.001
  • P value of less than 0.05 is considered significant.

  • *PASS scoring includes wheeze, work of breathing and prolonged expiratory phase.

  • ED, emergency department; PASS, Pediatric Asthma Severity Score; PP, pulsus paradoxus.