Table 1

Demographic and clinical characteristics of study participants

Characteristic	Group; no. (%)^*
Characteristic	Whole cohort, n = 40	1988–2002, n = 20	2003–2012, n = 20
Sex, male/female	24 (60)/16 (40)	10 (50)/10 (50)	14 (70)/6 (30)
Age, median (IQR) yr	40.5 (32.5–55.5)	43 (31–57.5)	39.5 (33.5–50.5)
Country of birth^†
Canada^‡	9 (23)	4 (20)	5 (25)
Algeria	9 (23)	3 (15)	6 (30)
Lebanon	5 (13)	2 (10)	3 (15)
Morocco	4 (10)	3 (15)	1 (5)
Italy	3 (8)	3 (15)	0
Bulgaria	2 (5)	0	2 (10)
Greece	2 (5)	2 (10)	0
Other^§	5 (13)	3 (15)	2 (10)
Presenting symptoms/signs
Abdominal pain	28 (70)	14 (70)	14 (70)
No symptoms/incidental	11 (28)	5 (25)	6 (30)
Nausea/vomiting	6 (15)	3 (15)	3 (15)
Palpable mass	3 (8)	2 (10)	1 (5)
Jaundice and/or fever	3 (8)	1 (5)	2 (10)
Echinoccocal serology^†
Positive	25 (68)	12 (60)	13 (76)
Negative	12 (32)	8 (40)	4 (24)
Imaging modalities
Ultrasonography	35 (88)	19 (95)	16 (80)
CT, abdomen	38 (95)	20 (100)	18 (90)
CT, chest	6 (15)	3 (15)	3 (15)
MRI	20 (50)	7 (35)	13 (65)^¶

CT = computed tomography; IQR = interquartile range; MRI = magnetic resonance imaging.
↵* Unless otherwise indicated.
↵† Data missing for some patients.
↵‡ Four of the 9 Canadian patients were from the First Nations.
↵§ Afghanistan, Armenia, Romania, Spain, Turkey, each with n = 1.
↵¶ p = 0.06.