Appendix 1.

Surgical and inpatient code for different complications studied

Complication	Surgical Code	Diagnosis Code (ICD9-10)
Bowel obstruction	4770; JFB 00; 4630	K562; K563; K564; K565; K566; K567; 560B; 560W; 560X; 560.10; 560.96
UTIs		N390; A410; A411; A412; A414; A415; A419; A418; N390X; N300; N309; N136; 599A; 595C; 595.00; 595.09; 590B; 590.10; 599.02; 590.00; 595X; 595A; 595W; 590A; 038X; 038E; 038B; 599.11; 599.02
Inguinal hernia	4200; JAB30; JAB10	550,99; 550X, K409
Nephrostomy tube	TKA 10; 6006; 6005
Wound hernia	4240; JAD30; JAD10	K439; 553C; 551,21
Stones in the urinary tract	6360; JFK10; KCE02; 6008; 6269; 6202; KBJ70; 6013	592A; 592B; N201; N202; N210; N200; 594X; N218; N209
Hydronephrosis due to ureteric stricture		N133, N131; 591X; 591; N135; 593D, 593E; N130, N139; 591.99
Kidney failure		N189; 585X; N179; 586X; 729.99; 584X; N180; N199