For neck pain , a mean reduction of -2.2 ( 95 % CI , -3.0 to -1.5 ) was noted in combination patients versus -1.2 ( CI , -1.9 to -0.5 ) in conservative group patients and -1.1 ( CI , -1.8 to -0.4 ) in those who received ESI ; P = 0.064 ) .