Pain score in the cinnamon group was significantly lower than that in the placebo group at ( 41 ) h ( adjusted difference : -0.6 , 95 % confidence interval : -1.0 to -0.2 ) and ( 81 ) h ( -0.9 , -1.4 to -0.3 ) after intervention , and on the 10-11th day after delivery ( -1.4 , -2.0 to -0.7 ) .