Table 2.
Study Participant, Methodology, and Diagnosis Demographics and Statistics
| Characteristics of the Study Participants
| ||
|---|---|---|
| Characteristics of the Pathologists | Demographics, No. (%) | |
| Total number of participants/total approached | 24/26 (92) | |
| Sex, M | 18 (75) | |
| Surgical pathology fellowship, yes | 16 (67) | |
| Expert lung pathologist, yes | 12 (50) | |
| Years of experience: | ||
| Minimum | 1 | |
| Median | 17 | |
| Maximum | 36 | |
|
Quality Assessment of Study Methodology | ||
| Characteristics of the H&E Slides | Frequency, % | |
|
| ||
| Slide of sufficient quality, yes | 91 | |
| Confidence in assigned diagnosis: | ||
| High | 52 | |
| Moderate | 40 | |
| Low | 8 | |
| Request for special stains, yes | 10 | |
|
Distribution of Morphologic Diagnoses | ||
| Morphology | Original Diagnosis, % | Study Diagnosis, % |
|
| ||
| Squamous cell | 35% | 36% |
| Adenocarcinoma | 35% | 31% |
| Adenosquamous | 13 | 3 |
| Large cell | 9 | 17 |
| Miscellaneousa | 6 | 7 |
| Sarcomatoid carcinoma | 1 | 4 |
| Carcinoid | 1 | 2 |
|
Original Pathologic Grade Assigned to Study H&E Slides | ||
| Original Pathologic Grade | Results, % | |
|
| ||
| Not poorly differentiated: | 57 | |
| Well differentiated | 3 | |
| Moderately differentiated | 54 | |
| Poorly differentiated | 43 | |
Abbreviation: H&E, hematoxylin-eosin.
a
Category includes adenoid cystic, mucoepidermoid, spindle cell, basaloid non–small cell lung carcinoma, and malignant mesothelioma.