The publisher regrets that due to an error in production two equations were printed incorrectly in the published version. We wish to apologise to the author and to the readers for any inconvenience caused. The correct equations are given below.

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formula
(1)

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Table 3

Calculated households' vulnerability to waterborne diseases in Yenagoa

Vulnerability driversni (4)ni (3)ni (2)ni (1)Total weightTN
Drinking water source 96 120 512 80 808 400 
Sanitation facility 176 176 200 212 764 400 
Hygiene facility 288 108 232 176 804 400 
Education status 176 156 344 132 808 400 
Income status 816 324 80 48 1,268 400 
Total 1,552 884 1,368 648 4,452 2,000 
wdvi = 4452/2000 = 2.226 
Vulnerability driversni (4)ni (3)ni (2)ni (1)Total weightTN
Drinking water source 96 120 512 80 808 400 
Sanitation facility 176 176 200 212 764 400 
Hygiene facility 288 108 232 176 804 400 
Education status 176 156 344 132 808 400 
Income status 816 324 80 48 1,268 400 
Total 1,552 884 1,368 648 4,452 2,000 
wdvi = 4452/2000 = 2.226 

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