Table 1:

Demographics and Incidence of ESCC in 3 Major African Cancer Registries between 2013 and 2017

	Combined	Nairobi, Kenya	Eastern Cape, South Africa	Kyadondo, Uganda
Number of cases	1022	384	340	298
Females, n (%)	482 (47.2%)	170 (44.3%)	196 (57.6%)	116 (38.9%)
Age group, n (%)	-	-	-	-
0 – 14	<5***	0 (0%)	<5***	0 (0%)
15–29	21 (2.1%)	9 (2.3%)	9 (2.6%)	<5***
30–44	104 (10.2%)	51 (13.3%)	16 (4.7%)	37 (12.4%)
45–59	372 (36.4%)	132 (34.4%)	110 (32.4%)	130 (43.6%)
60–74	375 (36.7%)	142 (37.0%)	141 (41.5%)	92 (30.9%)
75=>	149 (14.6%)	50 (13.0%)	63 (18.5%)	36 (12.1%)
Early Onset, n (%)	126 (12.3%)	60 (15.6%)	26 (7.6%)	40 (13.4%)
Cumulative Lifetime Incidence (per 100,000 person-years) *	1,508	1,560	1,805	1343
Cumulative Early Onset Incidence (per 100,000 person-years) *	33	27	82	33
Early Onset Proportion of Cumulative Incidence **	2.2%	1.7%	4.5%	2.4%

^*The cumulative incidence is the sum of the age-specific incidence over each year of age from birth to a defined upper age limit.

^**The early onset disease proportion of cumulative incidence = cumulative incidence of early onset / cumulative lifetime incidence x 100

^***Unreported, cells where the number of cases ranged from 1 to 4 were represented as <5 to ensure privacy.