Table 1.

Demographic characteristics of patients n (%)

Variable	Group 1	Group 2	P value
Cases	100	16	-
Age (yr)	33.1 ± 11.5	43.1 ± 12.3	0.043
Tumor size (cm)	6.5 ± 3.5	5.8 ± 2.0	NS
Symptoms			NS
Abdominal pain	41 (41)	6 (37.5)
Abdominal discomfort	17 (17)	2 (12.5)
Palpable abdominal mass	17 (17)	0
No symptoms	24 (24)	8 (50.0)
Jaundice	1 (1)	0
Location of tumors			NS
Head	31 (31)	7 (43.7)
Neck	21 (21)	2 (12.5)
Body and Tail	6 (6)	2 (12.5)
Tail	37 (37)	5 (31.3)
The uncinate process	4 (4)	0
Head and tail	1 (1)	0

Data are means with standard deviations in brackets or numbers with percentages in parentheses unless otherwise indicated. NS: Not significant.