A positive GERD diagnosis is made if acid or nonacid reflux precedes symptoms in a statistically meaningful manner.

The impedance-pH monitoring test determines if the patient's symptoms are related to acid reflux, related to nonacid reflux, or not related to reflux of any type.

You can head for the casino and blow a few thou on games of almost-chance, or enjoy a few hours out of those damned suits and back in sweet-tasting, nonacid seawater!