Research Article

Carboxyhaemoglobin Levels among Traders Exposed to Vehicular Emissions in Three Motor Parks in Ibadan, Nigeria

Table 4

Comparison of % COHb among study participants within and between groups.

AMP tradersIMP tradersNMP tradersNonmotor park traders-value value

% COHb0.5730.566
% COHb (group mean)24.153<0.001