Table 1.

Comparison between our study and other studies from South East Asia

	Shi et al[5] (2001)	She et al[6] (2009)	Shah et al[7] (2009)	Woon et al[8] (2006)	Our study (2013)
Country	China	Hong Kong	Kashmir	Singapore	Egypt
Total number	108	83	79	32	50
Sex	85:23	60:23	67:22	25:7	39:11
(F:M)	Ratio 3.7:1	Ratio 2.6:1	Ratio 3:1	Ratio 3.5:1	Ratio 3.5:1
Age
Mean	27.8 yr	45 mo	NR	41 yr	265 d
Range	3-68 yr	0-16 yr		18-74 yr	3 mo-65 yr
Presentation
Pain	(61%-56.5%)	(39%-46.9%)	(58%-73.4%)	(29%-91%)	(45%-93.8%)
Jaundice	(77%-71.3%)	(35%-42.2%)	(26%-32.9%)	(13%-41%)	(28%-58.3%)
Vomiting	NO	(26%-31.3%)	NO	(12%-38%)	(23%-47.9%)
Fever	(61%-56.5%)	NO	NO	(11%-34%)	(21%-43.8%)
Mass.	NO	NO	(20%-25.3%)	(8%-25%)	(4%-8.3%)
Triad	NO	(2%-2.4%)	(17%-21.5%)	(4%-13%)	(1%-2%)
Incidental	NO	NO	(7%-8.9%)	(3%-9%)	NO
Classification
I	(75%-69.4%)	(53%-67.9%)	(54%-68.3%)	(27%-84.4%)	(35%-72.9%)
II	NO	(4%-5.1%)	NO	(2%-6.2%)	NO
III	(1%-0.9%)	(2%-2.6%)	NO	NO	NO
IV	(24%-22.2%)	(15%-19.2%)	(21%-26.6%)	(2%-6.2%)	(12%-25%)
V	(6%-5.6%)	(4%-5.1%)	(4%-5%)	(1%-3.1%)	(1%-2.1%)
Unclassified	(2%-1.8%)	(5%-6.1%)	NO	NO	NO
APBDJ	NR	NR	(21%-26.6%)	NR	(6%-14.6%)

NR: Not reported; APBDJ: Anomalous pancreaticobiliary duct junction.