Relationship between health-related quality of life and chronic health conditions. (a) Association between HRQoL score from HUI2 and HUI3 and number of any health conditions. The HRQoL scores of both HUI2 and HUI3 were both significant as the number of health conditions increase since the p-values for both HUI2 and HUI3 are less than 0.001. However only the HRQoL score of HUI3 was significantly different in the presence of co-morbidities, p-value less than 0.05. (b) and (c) shows the association between HRQoL scores from HUI2 and HUI3 and the number of physical or developmental-behavioral condition respectively. The HRQoL score of HUI2 and HUI3 were significantly different as the number of developmental-behavioural conditions increase since there p-values were both less than 0.001.