There were no differences between groups in favour of the gabapentin group for pain or physical function on POD @ -LSB- @ % confidence interval ( CI ) : pain : -@ , @ ; function : -@ , @ -RSB- , @ weeks ( @ % CI : pain : @ , @ ; function : -@ , @ ) or @ months ( @ % CI : pain : -@ , @ ; function : -@ , @ ) after TKA .