Table 2. 30-day outcome measures and complication rates prior to matching .

	65-79 years old		80+ years old		p
	[n = 6,757]		[n = 1,625]
Return to OR	82	1.20%	26	1.60%	0.215
Readmission	191	2.80%	85	5.20%	<0.001
Reoperation	82	1.20%	26	1.60%	0.215
Non-home discharge	671	9.90%	488	30.00%	<0.001
Mortality	6	0.10%	8	0.50%	<0.001
Surgical Complications
Overall	161	2.40%	88	5.40%	<0.001
Superficial surgical site infection	10	0.10%	1	0.10%	0.703
Deep surgical site infection	12	0.20%	1	0.10%	0.484
Dehiscence	1	0.00%	0	0.00%	>0.999
Bleeding	138	2.00%	87	5.40%	<0.001
Medical Complications
Overall	144	2.10%	64	3.90%	<0.001
Wound infection	3	0.00%	0	0.00%	>0.999
Pneumonia	34	0.50%	16	1.00%	0.024
Reintubation	13	0.20%	8	0.50%	0.029
Failure to wean intubation	6	0.10%	6	0.40%	0.007
Pulmonary embolism	17	0.30%	10	0.60%	0.02
Renal insufficiency	5	0.10%	2	0.10%	0.627
Renal failure	2	0.00%	2	0.10%	0.171
Urinary tract infection	41	0.60%	25	1.50%	<0.001
Cerebrovascular accident	6	0.10%	3	0.20%	0.389
Cardiac arrest	2	0.00%	4	0.20%	0.015
Myocardial infarction	23	0.30%	6	0.40%	0.859
Deep venous thromboembolism	18	0.30%	10	0.60%	0.029
Systemic sepsis	10	0.10%	5	0.30%	0.171
Septic shock	2	0.00%	3	0.20%	0.053