Oropharyngeal acid reflux and motility abnormalities of the proximal esophagus

Table 1 Patients’ main clinical characteristics

	OP pH-	OP pH+
No. of patients	18	24
Male/female (% of male)	8/10 (44%)	6/18 (25%)
Mean age (years ± SD)	52.52 ± 11.71	50.51 ± 14.73
Mean BMI (± SD)	24.50 ± 3.71	24.32 ± 3.61
Mean RSI score	18.00	17.80
No. of patients with typical esophageal symptoms	8/18 (44.44%)	9/24 (37.50%)

Normal (OP pH-) or pathological (OP pH+). OP: Oropharyngeal; RSI: Reflux symptom index; BMI: Body mass index.