The relationship between subjective assessment instruments in chronic rhinosinusitis.

We propose a statistically validated definition of the relationship between MMS classification and VAS scoring. Based on our study we would define 'mild' as being 0- 3 inclusive, 'moderate, as > 3- 7 inclusive and 'severe' as > 7- 10 inclusive on the VAS scoring system. We further propose that in general QoL is more likely to be affected with VAS scores of 5 or more.