Table 1 

Data and calculations 

time period 0 
time period 1 
yearly change in incident breast cancer deaths per 100,000 



county 
number eligible 
incident breast cancer deaths 
fraction screened 
number eligible 
incident breast cancer deaths 
fraction screened 
estimate 
standard error 


Varmland 
39946 
36 
.03 
40853 
37 
.73 
.16 
7.55 
Sodermanland 
49526 
98 
.007 
53760 
79 
.77 
7.89 
4.28 
Uppsala 
43340 
110 
.03 
52426 
112 
.82 
5.73 
4.43 
Vastamanland 
49827 
112 
.14 
52329 
85 
.92 
8.88 
3.93 
Orebro 
52936 
133 
.04 
54366 
108 
.64 
9.74 
5.36 
Gavleborg 
56794 
311 
.00 
56145 
219 
.84 
13.40 
3.64 


Fraction screened is from Table 1 of [5]. Incident breast cancer deaths are from Table 3 of [5]. Number eligible is person years from Table 3 of [5] divided by years in time period from Table 2 of [5]. Calculations assume k = 0 for sensitivity analysis. Above yields Q = 3.72, σ^{2 }= 0, and overall estimate of 9 with 95% confidence (14, 4) per 100,000. 

Baker et al. BMC Medical Research Methodology 2004 4:12 doi:10.1186/14712288412 