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Table 3

Reductions as a result of maintenance on MNF at the different schools immediately after and 1 year after the intervention

Maintenance changeBooysen et al. (2019b) aThis paper
AggregatePrimary schools
High schools
Q2 and Q3Q4Q5Q2 and Q3Q4Q5
MNF (%) Shortly after 28% 34% 13% 21% 46% 53% 29% 49% 
1 year after – 21% −26% −23% 52% 30% 30% 37% 
MNF (L/h) Shortly after 55 46 25 22 24 170 30 62 
1 year after – 19 −52 −24 27 96 31 47 
Maintenance changeBooysen et al. (2019b) aThis paper
AggregatePrimary schools
High schools
Q2 and Q3Q4Q5Q2 and Q3Q4Q5
MNF (%) Shortly after 28% 34% 13% 21% 46% 53% 29% 49% 
1 year after – 21% −26% −23% 52% 30% 30% 37% 
MNF (L/h) Shortly after 55 46 25 22 24 170 30 62 
1 year after – 19 −52 −24 27 96 31 47 

The medians are compared as differences in percentage and L/h.

aThe results reported by Booysen et al. (2019b) were based on a mean reduction, and used only a week before and a week after maintenance. This paper used 3 weeks prior, 3 weeks subsequent to maintenance, and 3 weeks a year later. The results are therefore not directly comparable and only given as a reference.

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