Measurement of hepatic functional mass by means of 13C-methacetin and 13C-phenylalanine breath tests in chronic liver disease: Comparison with Child-Pugh score and serum bile acid levels

Table 3 Areas under receiver operating characteristic (ROC) curves for phenylalanine breath test (PBT) and methacetin breath test (MBT) in chronic hepatitis and cirrhotic patients.

PBT collecting time	Area	SE	MBT collecting time	Area	SE
10 min	0.45	0.07	10 min	0.83	0.04
20 min	0.54	0.07	20 min	0.86	0.04
30 min	0.59	0.07	30 min	0.89	0.03
40 min	0.64	0.06	40 min	0.91	0.03
50 min	0.69	0.06	50 min	0.92	0.03
60 min	0.72	0.05	60 min	0.93	0.03
70 min	0.7	0.06	70 min	0.93	0.02
80 min	0.7	0.06	80 min	0.93	0.02
90 min	0.7	0.06	90 min	0.93	0.02
100 min	0.71	0.05	100 min	0.93	0.02
110 min	0.72	0.06	110 min	0.92	0.03
120 min	0.72	0.05	120 min	0.92	0.03