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Table 2 Predictor and Outcome Variable Measurements

From: Noninvasive assessment of asthma severity using pulse oximeter plethysmograph estimate of pulsus paradoxus physiology

Variable Baseline* (n = 219) 2 Hour* (n = 138) 4 Hour* (n = 58)
Predictor    
   PEP† 38 (31 - 44, 214) 35 (29 - 40, 136) 38 (31 - 43, 57)
Outcomes    
   %FEV1 61 (42 - 80, 148) 69 (52 - 82, 100) 63 (47 - 81, 46)
   Airway resistance    
Age 5 to 10 yr‡ 178 (142 - 241, 150) 143 (124 - 172, 93) 141 (124 - 161, 39)
Ages ≥ 11 yr§ 0.71 (0.56 - 0.94, 67) 0.59 (0.44 - 0.75, 44) 0.68 (0.56 - 0.80, 19)
   Access. M. Use¶ 105 (48) 38 (28) 9 (16)
  1. Data are presented as medians (IQR, number of non-missing values)
  2. *Baseline value is before corticosteroid (CCS) administration. Two and 4 hour time points are times from CCS administration.
  3. †PEP is Plethysmograph Estimate of Pulsus Paradoxus physiology. PEP values represent percent change in the plethysmograph waveform and have no unit values.
  4. ‡Percent predicted value
  5. § Absolute value (kPa/L/s)
  6. ¶Number of non-missing values (%) of subjects with any visible use of the scalene, sternocleidomastoid, suprasternal, intercostal or subcostal muscles