The 4-by-2 mixed-model ANOVA also revealed a significant time-by-group interaction ( P < .001 ) for PPT : patients who received TrP DN experienced a greater increase in PPT ( decreased pressure sensitivity ) than those who received TrP MT at all follow-up periods ( between-group differences : posttreatment , 59.0 kPa ; 95 % confidence interval [ CI ] : 40.0 , 69.2 ; 1-week follow-up , 69.2 kPa ; 95 % CI : 49.5 , 79.1 ; 2-week follow-up , 78.9 kPa ; 95 % CI : 49.5 , 89.0 ) .