Visual Analogue Score of headache No. of person days SWOS Buprenorphine dose
mean (SD)   mean (SD)  
0 2592 3.4 (5.9)   5.7 (5.0)  
1-3 1763 16.8 (7.8) p<0.01 1.3 (2.7) p<0.01
≥4 1248 7.9 (13.1) P=0.1 5.6 (7.3) P=0.3
Table 1: Opiate withdrawal scores (SWOS) and buprenorphine dose in different person days of treatment based on headache intensity.