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Table 1 Comparison of baseline characteristics in responders and nonresponders

From: Orthostatic plasma norepinephrine level as a predictor for therapeutic response to metoprolol in children with postural tachycardia syndrome

Characteristics Responders Nonresponders P value
Cases (n = 25)* 13 12  
Age, years 12 ± 2 11 ± 3 0.655
BMI, kg/m2* 19.7 ± 4.9 17.2 ± 2.5 0.130
Females/males, n 7/6 6/6 0.716
Symptoms score before treatment 7.4 ± 1.9 7.2 ± 2.7 0.820
Supine systolic BP, mmHg 101.9 ± 9.3 98.0 ± 8.6 0.286
Supine diastolic BP, mmHg 58.0 ± 9.7 55.1 ± 8.1 0.426
Supine hear rate, beats/min 74.0 ± 9.4 75.6 ± 9.8 0.683
Orthostatic plasma norepinephrine level, pmol/ml 5.10 ± 2.69 2.93 ± 1.79 0.028
  1. *Two out of 27 cases lost during follow-up.