TABLE 2.
Analysis of biopsy depthby treatment and tissue type
| Squamous |
Columnar |
|||||
|---|---|---|---|---|---|---|
| Sham | RFA | P value | Sham | RFA | P value | |
| Partial epithelium, no. (%) | 775 (100) | 3806 (100) | NS | 764 (100) | 303 (100) | NS |
| Full epithelium, no. (%) | 638 (82.3) | 3110 (81.7) | NS | 755 (99.8) | 301 (99.3) | NS |
| Lamina propria, no. (%) | 613 (79.1) | 2985 (78.4) | NS | 755 (99.8) | 300 (99.0) | NS |
| Muscularis mucosae, no. (%) | 51 (6.6) | 231 (6.1) | NS | 576 (75.4) | 215 (71.0) | NS |
| Submucosa, no. (%) | 4 (0.5) | 13 (0.3) | NS | 64 (8.4) | 9 (3.0) | .001* |
Columnar includes any fragment classified as glandular only, intestinal metaplasia, or mixed.
NS, Not significant; RFA, radiofrequency ablation.
*
This difference is not statistically significant when an analysis stratified for tissue type (glandular, intestinal metaplasia, mixed) was performed.