Table 1. Clinicopathologic features of patients.

Characteristics	Categories	Patients (n = 133)
Median age at diagnosis, years (range)	-	48.3 (15.8–89.0)
Ethnic group	Chinese	94 (71%)
	Malays	21 (16%)
	Indians	6 (5%)
	Others	12 (9%)
Smoking history (n = 52)	Non-smoker/Ever-smoker	38 (73%)/14 (27%)
Family history of cancer (n = 59)	Negative/Positive	45 (76%)/14 (24%)
Presence of comorbidities (n = 126)	No/Yes	48 (38%)/78 (62%)
Stage at diagnosis (n = 125)	I	100 (80%)
	II	7 (6%)
	III	15 (12%)
	IV	3 (2%)
Tumour differentiation/grade (n = 117)	well	71 (61%)
	moderate	34 (29%)
	poor	12 (10%)
Tumour type (n = 130)	Mixed borderline/Non-borderline	50 (38%)/80 (62%)
Ovarian surface involvement (n = 122)	No/Yes	75 (61%)/47 (39%)
Lymphovascular invasion (n = 126)	No/Yes	118 (94%)/8 (6%)
Median CA125, U/mL (range) (n = 117)	-	71.3 (3.0–8812.5)
Received OGD (n = 126)	No/Yes	107 (85%)/19 (15%)
Received colonoscopy (n = 126)	No/Yes	102 (81%)/24 (19%)
Received appendectomy (n = 127)	No/Yes	62 (49%)/65 (51%)
Received omentectomy (n = 128)	No/Yes	10 (8%)/118 (92%)
Received chemotherapy (n = 124)	No/Yes	68 (55%)/56 (45%)
Received adjuvant chemotherapy (n = 123)	No/Yes	83 (67%)/40 (33%)

Abbreviation: OGD, oesophagogastroduodenoscopy.