Table 3. Subgroup analysis based on lesion size.
| < 10 mm | P value | 11 – 15 mm | P value | 16 – 20 mm | P value | 21 – 30 mm | P value | > 30 mm | P value | |
| Diagnostic yield for FNB N = 90 | 4/7 (57.1 %) | NS | 11/13 (84.6 %) | NS | 17/19 (89.5 %) | 0.0005 | 29/30 (96.7 %) | 0.0001 | 29/32 (90.6 %) | 0.002 |
| Diagnostic yield for FNA N = 17 | 3/6 (50 %) | 4/8 (50 %) | 2/9 (22.2 %) | 4/14 (28.6 %) | 4/9 (44.4 %) | |||||
| GISTs in FNB group N = 75 | 3/7 (42.9 %) | NS | 6/13 (46.2 %) | NS | 15/19 (79 %) | 0.0009 | 24/30 (80 %) | 0.0002 | 27/32 (84.4) | 0.02 |
| GIST in FNA group N = 12 | 0 | 4/8 (50 %) | 1/9 (11.1 %) | 3/14 (21.4 %) | 4/9 (44.4 %) | |||||
| Leiomyoma in FNB group N = 11 | 1/7 (14.3 %) | NS | 4/13 (30.8 %) | NS | 2/19 (10.5 %) | NS | 2/30 (6.7 %) | NS | 2/32 (6.3 %) | NS |
| Leiomyoma in FNA group N = 3 | 2/6 (33.3 %) | 0 | 1/9 (11.1 %) | 0 | 0 | |||||
| Other in FNB group N = 4 | 0/7 | NS | 1/13 (7.7 %) | NS | 0 | NS | 3/30 (10 %) | NS | 0 (0 %) | NS |
| Other in FNA group N = 2 | 1/6 (16.7 %) | 0 | 0 | 1/14 (7.1 %) | 0 (%) | |||||
| IHC in FNB group N = 90 | 4/7 (42.9 %) | NS | 11/13 (84.6 %) | NS | 17/19 (89.5 %) | 0.0005 | 29/30 (96.7 %) | 0.0001 | 29/32 (90.6 %) | 0.01 |
| IHC in FNA group N = 19 | 3/6 (50 %) | 4/8 (50 %) | 2/9 (22.2 %) | 5/14 (35.7 %) | 5/9 (55.6 %) | |||||
| Cytopathology yield for FNB N = 93 | 4/7 (57.1 %) | NS | 12/13 (92.3) | 0.03 | 17/19 (89.5 %) | 0.0005 | 29/30 (96.7 %) | 0.0001 | 31/32 (96.9 %) | 0.008 |
| Cytopathology yield for FNA N = 21 | 4/6 (66.7 %) | 4/8 (50 % ) | 2/9 (22.2 %) | 5/14 (35.7 %) | 6/9 (66.7 %) |
FNB, fine-needle biopsy; GIST, gastrointestinal stromal tumor; FNA, fine-needle aspiration. NS, not significant or cannot calculate due to null values in one group.