Figure 3

Threshold levels in Sweden and Britain /Denmark (L = Low, M = Medium, H = High and VH = Very High), and the traffic light model (Low, Medium and High). There was no significant change (ns) in symptom score between low and medium levels, when the Swedish threshold levels were used, neither was the change in symptom scores between high and very high levels as defined in the British system. * = p < 0.05, ** = p < 0.01, *** = p < 0.001.