The pain score was reduced from @ to @ ( @ % confidence interval , @ to @ ) ( P = @ ) in the first hour and from @ to @ ( @ % confidence interval , @ to @ ) in the sixth hour , and there was a significantly lower overall requirement for early postoperative fentanyl , reduced from a mean of @ to @ g ( P = @ ) , and morphine , reduced from a mean of @ to @ mg ( P = @ ) .