Table 3 

Strength of the relationship and coefficient of determination between unit cost and program scale 

VCT 
SW 
PMTCT 



Unit cost decrease associated with doubling of scale ^{1} 
pvalue of regression 
Coefficient of determination (R^{2}) 
Unit cost decrease associated with doubling of scale ^{1} 
pvalue of regression 
Coefficient of determination (R^{2}) 
Unit cost decrease associated with doubling of scale ^{1} 
pvalue of regression 
Coefficient of determination (R^{2}) 



India 
32.5% 
< 0.001 
0.83 
41.8% 
< 0.001 
0.88 
23.0% 
0.038 
0.42 
Mexico 
15.3% 
0.066 
0.20 

Russia 
27.2% 
0.021 
0.28 
41.0% 
< 0.001 
0.84 

South Africa 
2.4% 
0.033 
0.33 
31.2% 
0.015 
0.38 

Uganda 
27.5% 
0.045 
0.29 



STI 
IEC 
RR 



India 
52.4% 
0.050 
0.42 

Mexico 
32.3% 
0.038 
0.70 
46.3% 
< 0.001 
0.91 

Russia 
58.0% 
0.385 
0.26 
34.5%/47.9% ^{2} 
0.004/0.022 
0.45/0.96^{2} 

South Africa 

Uganda 



1. "Doubling" is a 100% increase in output from the first quartile output value. 2. Needle exchange programs/Rehabilitationfocused programs 

Marseille et al. BMC Health Services Research 2007 7:108 doi:10.1186/147269637108 