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Table 3 24 hour pH monitoring data of subjects

From: Response of the airways and autonomic nervous system to acid perfusion of the esophagus in patients with asthma: a laboratory study

  SPRP SPRN SNRP SNRN
Proximal sensor (15cm above LES)
Total No of reflux episodes 100.0 ± 23.2 14.7 ± 7.2 87.7 ± 25.3 12.1 ± 2.8
No of reflux episodes> 5min 5.8 ± 1.5 0.6 ± 0.3 3.7 ± 1.2 1.7 ± 0.6
Longest reflux episode 71.5 ± 14.8 13.0 ± 12.8 45.7 ± 17.3 2.9 ± 1.4
Total % of time pH<4 9.8 ± 3.4 0.2 ± 0.05 4.9 ± 1.3 0.3 ± 0.07
% of time pH<4 in upright position 7.0 ± 2.8 0.2 ± 0.06 8.1 ± 2.1 0.3 ± 0.09
% of time pH<4 in supine position 12.1 ± 5.3 0.1 ± 0.0 5.3 ± 2.8 0.3 ± 0.2
Demeester score 45.2 ± 12.1 3.7 ± 2.3 31.1 ± 7.3 2.8 ± 0.4
Distal sensor (5cm above LES)
Total No of reflux episodes 103.2 ± 20 31.5 ± 7.3 64.9 ± 13.8 22.7 ± 7.2
No of reflux episodes> 5min 6.4 ± 0.9 10.8 ± 8.1 4.3 ± 0.9 1.6 ± 0.8
Longest reflux episode 58.8 ± 15.2 4.8 ± 1.7 51.2 ± 15.4 2.9 ± 1.1
Total % time pH<4 14.6 ± 4.5 0.7 ± 0.2 8.8 ± 2.0 0.5 ± 0.2
% time pH<4 in upright position 9.7 ± 3.3 1.5 ± 0.7 7.5 ± 2.4 1.1 ± 0.7
% time pH<4 in supine position 20.2 ± 6.2 0.7 ± 0.3 5.9 ± 2.0 0.5 ± 0.2
Demeester score 57.0 ± 12.2 6.3 ± 1.3 31.4 ± 5.4 4.3 ± 1.2
  1. All values as mean ± SE.
  2. SPRP GERD symptom positive, reflux positive, SPRN GERD symptom positive, reflux negative, SNRP GERD symptom negative, reflux positive, SNRN GERD symptom negative, reflux negative.