Characteristics of and risk factors for colorectal neoplasms in young adults in a screening population

Table 6 Comparison of neoplasm characteristics between young and old subjects n (%)

Characteristics of adenoma	Age group		P value
	Young age group, < 50 (n = 253)	Old age group,≥50 (n = 302)
Number	1.31 ± 0.66	1.82 ± 1.39	< 0.001
Multiple	59 (23.3)	121 (40.1)	< 0.001
Rt. side location	112 (44.3)	156 (51.7)	0.083
Advanced neoplasm	16 (6.3)	25 (8.3)	0.381
Villous or tubulovillous	3 (1.2)	7 (2.3)	0.318
High grade	2 (0.8)	4 (1.3)	0.545
Size > 1 cm	13 (5.1)	24 (7.9)	0.187