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Table 1 Baseline MII results

From: Discounting the duration of bolus exposure in impedance testing underestimates acid reflux

  Parameters Median Range (Min, Max)
Duration of analysis Duration of analysis total (hours:min) 21:22 (20:01, 24:22)
Duration of analysis upright (hours:min) 12:17 (2:35, 18:25)
Duration of analysis recumbent (hours:min) 8:59 (2:50, 20:47)
Median gastric pH 2.2 (1.6,3.7)a
Esophageal acid exposure Percentage time total ph < 4 (%) 1.6 (0,17.3)
Percentage time upright ph < 4 (%) 1.9 (0,24.4)
Percentage time recumbent ph < 4 (%) 0.8 (0,23.3)
Episodes Over 5 min 0.0 (0,11.1)
Longest Episode/min 4.8 (1,96.5)
Total Episodes 27.2 (1.1, 122.7)
Demeester score 5.8 (0.8,59.1)
Impedance Baseline impedance/Ω 1614 (588,5420)
no. of impedance events (total) 41 (6,162)
no. of impedance events (upright) 37 (2,149)
no. of impedance events (recumbent) 5 (0,45)
longest impedance detected episode/min 3.4 (0.2,161)
Acid reflux 21 (0,88)
Non-acid reflux 17 (1,159)
  Bolus exposure (%) 1.3 (0.1, 21.2)
  1. aGastric pH data missing in 27 studies