Fig. 2. Distribution of the different subscales of the SF-36 for each of the three study groups. 
; = good sleepers (N = 391); 
; = mild insomniacs (N = 422); 
; = severe insomniacs (N = 240).
Fig. 2. Distribution of the different subscales of the SF-36 for each of the three study groups. ; = good sleepers (N = 391); ; = mild insomniacs (N = 422); ; = severe insomniacs (N = 240).