Table 5.

Age distribution of Tenwek Hospital EC cases in 1999–2007, by selected patient characteristics¹

	Number of EC cases with Age	Mean Age (±standard deviation)	P-value	≤ 30 years (total N=58)	P-value	≤ 40 years (total N=147)	P-value
Sex
Male	563	56.4 (±16.0)	0.159	39 (6.9%)	0.380	94 (16.6%)	0.562
Female	348	57.9 (±15.4)		19 (5.4%)		53 (15.2%)
Histological type
ESCC	806	56.5 (±15.9)	0.016	55 (6.8%)	0.272	137 (16.9%)	0.165
EAC	82	60.9 (±15.1)		3 (3.7%)		9 (11.0%)
Location of Residence
Within Catchment Area	562	55.9 (±16.4)	0.008	46 (8.1%)	0.005	103 (18.2%)	0.025
Outside Catchment Area	349	58.7 (±14.5)		12 (3.4%)		44 (12.6%)
Ethnicity
Kalenjin	565	55.3 (±16.6)	< 0.001	52 (9.2%)	< 0.001	115 (20.3%)	< 0.001
Non-Kalenjin	346	59.7 (±13.8)		6 (1.7%)		32 (9.3%)

¹Totals vary due to missing data