Table 2.
ADC histogram parameters for differentiating different T and N stages of gastric cancers
| n | ADCmean | ADCmin | ADCmax | ADC5% | ADC10% | ADC25% | ADC50% | ADC75% | ADC90% | |
|---|---|---|---|---|---|---|---|---|---|---|
| T1 | 12 | 1804.56 (331.03) | 804.00 (541.00) | 3291.00 (976.00) | 1309.50 (337.25) | 1428.00 (405.00) | 1586.50 (397.50) | 1769.50 (376.50) | 1985.50 (375.50) | 2297.00 (352.25) |
| T2 | 10 | 1736.87 (334.60) | 545.00 (492.00) | 3198.50 (328.00) | 1086.50 (468.25) | 1285.00 (355.50) | 1527.00 (286.00) | 1735.00 (374.50) | 1970.00 (380.00) | 2179.50 (363.25) |
| T3 | 40 | 1569.38 (445.54) | 451.00 (386.75) | 3514.50 (553.75) | 1038.00 (315.50) | 1123.00 (365.25) | 1307.00 (409.25) | 1549.50 (467.50) | 1775.00 (478.00) | 2053.00 (561.75) |
| T4 | 18 | 1486.67 (206.90) | 493.00 (239.50) | 3505.50 (857.50) | 998.00 (221.00) | 1061.50 (219.00) | 1199.50 (178.25) | 1389.00 (176.50) | 1657.50 (248.75) | 2027.50 (286.75) |
| P | 0.001* | 0.069 | 0.466 | 0.008* | 0.002* | <0.001* | <0.001* | 0.002* | 0.010* | |
| N0 | 18 | 1856.23 (312.81) | 750.00 (396.75) | 3195.00 (536.75) | 1301.50 (308.25) | 1428.50 (290.00) | 1620.50 (285.75) | 1818.50 (347.75) | 2060.50 (354.50) | 2261.50 (328.00) |
| N1 | 11 | 1566.30 (483.09) | 512.00 (275.00) | 3502.00 (762.00) | 957.00 (488.00) | 1028.00 (554.00) | 1257.00 (592.00) | 1596.00 (566.00) | 1823.00 (488.00) | 2066.00 (446.00) |
| N2 | 11 | 1660.12 (346.68) | 568.00 (353.00) | 3609.00 (815.00) | 1018.00 (160.00) | 1142.00 (177.00) | 1366.00 (174.00) | 1605.00 (375.00) | 1947.00 (470.00) | 2141.00 (542.00) |
| N3 | 31 | 1552.96 (326.16) | 382.00 (425.00) | 3463.00 (449.00) | 1026.00 (308.00) | 1117.00 (328.00) | 1271.00 (313.00) | 1494.00 (321.00) | 1759.00 (378.00) | 2074.00 (430.00) |
| Nx | 9 | 1489.73 (216.96) | 391.00 (336.50) | 3548.00 (932.00) | 991.00 (233.00) | 1054.00 (223.50) | 1179.00 (189.50) | 1379.00 (219.50) | 1652.00 (227.00) | 2017.00 (246.00) |
| P† | 0.007* | 0.005* | 0.277 | 0.006* | 0.004* | 0.004* | 0.005* | 0.013* | 0.023* |
ADC apparent diffusion coefficient; Nx: 9 patients were categorized as Nx because they underwent palliative surgeries which could not completely meet the requirements for N staging
The values of the ADC parameters were presented as median (interquartile range)
*: P < 0.05 (independent-samples Kruskal-Wallis test)
†: The independent-samples Kruskal-Wallis test for N staging didn’t include those 9 patients who were categorized as Nx