Table 1. Cytoplasmic AQP1 expression in glandular epithelium of different breast tissues.
| Histological type | Cases | AQP1 score, n (%) | χ2 | P | ||
|---|---|---|---|---|---|---|
| 0 | 1–2 | 3–9 | ||||
| Benign lesions | 33 | 21 (63.6) | 7 (21.2) | 5 (15.2) | 23.657 | 0.000c |
| DCISa | 45 | 14 (31.1) | 18 (40.0) | 13 (28.9) | ||
| IDCb | 341 | 77 (22.6) | 121 (35.5) | 143 (41.9) | ||
a
DCIS: ductal carcinoma in situ.
b
IDC: invasive ductal carcinoma.
c
P value was calculated by Kruskal-Wallis test.
The sequence of the 3 groups: benign breast lesions < DCIS (Z = −2.528, P = 0.011) < IDC (Z = −2.243, P = 0.025) (Mann-Whitney U test).