Distance to Health Care Facilities, Lifestyle Risk Factors, and Stage at Diagnosis in relation to Geographic Pattern of Esophageal Cancer in Tanzania, 2006–2016
Table 4
Yearly incidence rate (IR) variation between zones from 2006-2016.
Year
Central IR
Eastern IR
Lake IR
Northern IR
Southern IR
Southern highlands IR
Southwest highlands IR
Western IR
Average yearly IR
value
2006
2.08
15.91
0.49
3.35
1.93
3.51
1.10
1.70
3.76
<0.01
2007
3.81
11.46
0.57
4.70
0.95
3.77
1.33
1.08
3.46
<0.01
2008
2.18
15.34
1.09
4.58
1.39
3.02
1.54
2.08
3.90
<0.01
2009
3.60
16.59
0.88
6.42
0.91
4.27
3.22
1.25
4.64
<0.01
2010
2.27
16.68
0.59
7.97
1.34
4.82
2.88
1.68
4.83
<0.01
2011
2.20
13.98
0.49
5.38
0.44
4.09
0.93
0.92
3.55
<0.01
2012
1.55
10.01
0.47
4.53
0.43
2.47
1.35
0.44
2.66
<0.01
2013
3.02
9.06
0.53
5.68
2.10
3.33
1.53
0.43
3.21
<0.01
2014
2.94
17.88
0.74
6.95
2.06
6.24
1.27
2.05
5.02
<0.01
2015
3.58
17.52
0.71
7.99
2.03
5.26
1.85
0.79
4.97
<0.01
2016
2.79
15.08
0.55
9.66
1.43
4.02
2.00
0.57
4.51
<0.01
Average
2.77
14.49
0.64
6.21
1.38
4.10
1.73
1.15
4.06
<0.01
value
0.99
0.79
1.00
0.84
0.99
0.99
0.98
0.97
1.00
Incidence rate (IR) is calculated as the number of cases per 1,000,000 persons in each zone. Zonal variation in esophageal cancer by year was statistically significant using a chi-square test for independence at a value of 0.05 for every Zone. Annual variation in esophageal cancer by zone was not statistically significant at a value ≤ 0.05.
