Table 5.

Tumors categorized as “benign neoplasm or low-grade carcinoma” in the PSC system^* by each observer

Final diagnosis	Ob1	Ob2	Ob3	Ob4	Ob5	Ob6	Ob7
No ML	2	0	0	0	0	0	0
Benign tumor	12	2	8	14	9	1	13
ML	0	1	8	0	1	4	2
Total	14	3	16	14	10	5	15
Accuracy of diagnosis %**	85.7	66.7	50	100	90	20	88.2
Ratio of malignancy %***	0	33.3	50	0	10	80	13.3

Ob, observer; PSC, Papanicolaou Society of Cytopathology; ML, malignancy.

^*The PSC reporting system for lung carcinoma.

^**Accuracy of diagnosis shows the proportion of cases that were benign tumors in each observer's category of “benign neoplasm or low-grade carcinoma.”

^***Ratio of malignancy shows the proportion of cases that were malignant in each observer's category of “benign neoplasm or low-grade carcinoma.”