Table 1.

Durations of bolus transit phases

	Phase I	Phase II	Phase III	Phase IV
Duration, supine, s	0.9 (0.8–1.1)	2.7 (2.5–2.9)	3.2 (2.7–3.9)	4.3 (3.4–5.2)
Duration upright, s	0.8 (0.7–0.9)	2.6 (2.3–2.9)	3.2 (3.0–3.7)	3.9 (3.4–5.1)
Percent of overall trans-EGJ flow time, supine	0 (0–0)	0 (0–0)	14.8 (4.1–28.0)*	86.1 (64.7–98.2)*
Percent of overall trans-EGJ flow time, upright	0 (0–0)	0 (0–0)	52.6 (46.7–77.7)	49.1 (36.1–76.4)

^*P < 0.05 vs. upright position during the same phase.