Table 3. Comparison of nuclear expression of Notch1 between DLBCL morphology and CHL morphology by pathogenesis.

Notch1 positivity	MTX-LPD			de novo
	DLBCL type (n = 24)	CHL type (n = 24)	P	DLBCL (n = 19)	CHL (n = 15)	P
2+	14	3		6	4
1+	8	8		7	3
0	2	13		6	8
Positive rate (%)†	91.7	45.8	<0.001**	68.4	46.7	0.1766

† Positive rates were calculated for 1+ and 2+ cases.

Fisher’s exact analysis and chi-square test was used for the statistical analysis of nominal scales. **P < 0.001.