PD without intraperitoneal drainage was associated with an increase in the number of complications per patient -LSB- @ ( @-@ ) vs @ ( @-@ ) , P = @ -RSB- ; an increase in the number of patients who had at least @ grade @ complication -LSB- @ ( @ % ) vs @ ( @ % ) , P = @ -RSB- ; and a higher average complication severity -LSB- @ ( @-@ ) vs @ ( @-@ ) , P = @ -RSB- .