Electrogastrography: Poor correlation with antro-duodenal manometry and doubtful clinical usefulness in adults

Table 2 Correlation matrix (r-values) for parameters from antroduodenal manometery and electrogastrography (n = 144)

Parameters	Pre MI1	Post MI1	MI ratio§	Pre Freq	Post Freq	Pre Amp1	Post Amp1	Amp Ratio1
Pre-Brady power1	0.15	0.01	-0.10	0.10	0.01	0.08	0.06	-0.01
Pre-Normo power1	0.06	0.03	-0.01	0.10	0.05	-0.01	-0.01	0.00
Pre-Tachy power1	0.10	0.05	-0.03	0.13	0.07	0.01	0.00	-0.01
Pre-Brady DF%	0.06	-0.01	-0.05	0.05	0.01	-0.09	0.08	0.12
Pre-Normo DF%	0.05	0.09	0.06	0.08	0.08	0.06	0.14	0.06
Pre-Tachy DF%	-0.03	-0.13	-0.11	-0.07	-0.12	-0.02	-0.18a	-0.11
Pre-DFIC	-0.04	0.04	0.06	-0.12	0.02	0.07	0.03	-0.04
Pre-DPIC	-0.01	-0.13	-0.12	-0.12	-0.13	0.09	-0.10	-0.14
Pre-DF	-0.08	-0.11	-0.05	-0.10	-0.10	-0.04	-0.17a	-0.09
Pre-PDP1	-0.09	0.01	0.08	0.00	0.03	-0.02	-0.04	-0.02
Post-Brady power1	0.04	-0.04	-0.07	0.13	-0.04	-0.10	0.02	0.09
Post-Normo power1	0.09	-0.01	-0.07	0.13	0.04	-0.03	-0.04	-0.01
Post-Tachy power1	0.08	0.01	-0.05	0.15	0.03	-0.06	-0.02	0.03
Post-Brady DF%	0.00	0.01	0.01	-0.02	-0.07	-0.06	0.01	0.05
Post-Normo DF%	-0.03	-0.03	-0.01	-0.06	-0.04	0.06	0.06	0.00
Post-Tachy DF%	0.02	-0.04	-0.05	0.05	-0.02	-0.05	-0.09	-0.02
Post-DFIC	0.04	0.03	-0.01	0.11	0.08	-0.09	-0.11	-0.01
Post-DPIC	-0.06	-0.1a	-0.14	-0.09	-0.17a	0.02	-0.18a	-0.15
Post-DF	0.04	-0.01	-0.04	0.06	0.00	-0.05	0.00	0.04
Post-PDP1	0.06	-0.01	-0.04	0.08	0.04	0.01	-0.02	-0.03
Power ratio1	0.04	-0.04	-0.07	0.04	-0.01	-0.02	-0.04	-0.01

¹Log values,

^aP < 0.05.