Short- and medium-term reproducibility of gastric emptying of a solid meal determined by a low dose of 13C-octanoic acid and nondispersive isotope-selective infrared spectrometry

Table 1 Reproducibility of solid gastric emptying measurement with breath test at a 68 mg (75 μL) dose of ¹³C-Octanoic acid and isotope-selective nondispersive infrared spectrometry

Observed values1	T-Lag,lag phase149.7 ± 4.6 min		T½,gastric half emptying time195.6 ± 4.2 min		GEC,gastric emptying coefficient2.56 ± 0.09
	Short-term	Medium-term	Short-term	Medium-term	Short-term	Medium-term
RC (min)	31.6	46.7	39.1	59.1	0.61	0.87
CVp (%)	7.7	11.2	7.3	10.9	8.3	12.5
△0.05 (min)	9.6	15.6	11.6	19.7	0.17	0.29

Short-term reproducibility involved twelve paired examinations performed 2 d apart, whereas medium-term reproducibility involved twelve paired examinations at a median interval of 21.5 d (range 17 - 23 d) RC = repeatability coefficient, CVp = coefficient of variation for paired examinations, △0.05 = the least statistically significant difference detectable atP = 0.05 level, two-tailed¹ These data are grand means calculated on average values obtained during three examinations carried out on separate days