Do-Not-Resuscitate status as an independent risk factor for patients undergoing surgery for hip fracture

Table 3 Propensity score matched case mix of procedures and the distribution within Do-Not-Resuscitate and non-Do-Not-Resuscitate status groups

	Do-Not-Resuscitate			Not Do-Not-Resuscitate			OR (95%CI)	P-values
Category	Num	Denom	%	Num	Denom	%
Age, mean (SD)	85.1	NA	6.7	85.0	NA	6.5	1.001 (0.985-1.016)	0.946
< 65	17	725	2.3	18	725	2.5	Reference	0.982
65-80	92	725	12.7	93	725	12.8	1.047 (0.508-2.158)
> 80	616	725	85.0	614	725	84.7	1.062 (0.542-2.081)
Sex
Male	177	725	24.4	165	725	22.8	Reference	0.458
Female	548	725	75.6	560	725	77.2	0.912 (0.716-1.163)
Demographics
White	692	725	95.4	689	725	95.0	Reference	0.462
Black	6	725	0.8	4	725	0.6	1.493 (0.42-5.316)
Asian	3	725	0.4	9	725	1.2	0.332 (0.089-1.231)
Other	3	725	0.4	2	725	0.3	1.493 (0.249-8.966)
Not Reported	21	725	2.9	21	725	2.9	0.996 (0.539-1.84)
Hispanic	17	725	2.3	17	725	2.3	1 (0.506-1.974)	1
BMI
Mean (SD)	24.1	NA	5.6	24.3	NA	5.4	0.996 (0.977-1.015)	0.646
< 18.5	90	725	12.4	88	725	12.1	0.999 (0.719-1.389)	0.901
18.5-25	350	725	48.3	342	725	47.2	Reference
25-30	198	725	27.3	211	725	29.1	0.917 (0.718-1.171)
> 30	87	725	12.0	84	725	11.6	1.012 (0.724-1.415)
Functional status
No Dyspnea	614	725	84.7	608	725	83.9	Reference	0.899
Dyspnea with moderate exertion	77	725	10.6	80	725	11.0	0.953 (0.684-1.329)
Dyspnea at rest	34	725	4.7	37	725	5.1	0.91 (0.564-1.469)
Independent	267	725	36.8	269	725	37.1	Reference	0.938
Partially Dependent	342	725	47.2	336	725	46.3	1.025 (0.818-1.286)
Totally Dependent	116	725	16.0	120	725	16.6	0.974 (0.717-1.323)
ASA class
1 or 2	47	725	6.5	49	725	6.8	0.955 (0.627-1.455)	0.977
3	444	725	61.2	442	725	61.0	Reference
4 or 5	234	725	32.3	234	725	32.3	0.995 (0.796-1.245)
Comorbidities
Hypertension	547	725	75.4	555	725	76.6	0.941 (0.74-1.198)	0.623
Diabetes	120	725	16.6	113	725	15.6	1.074 (0.812-1.422)	0.617
COPD	112	725	15.4	117	725	16.1	0.949 (0.716-1.259)	0.719
CHF	36	725	5.0	40	725	5.5	0.895 (0.563-1.421)	0.637
CAD	147	725	20.3	159	725	21.9	0.905 (0.703-1.165)	0.44
PVD	17	725	2.3	23	725	3.2	0.733 (0.388-1.384)	0.336
CKD	16	725	2.2	12	725	1.7	1.341 (0.63-2.855)	0.445
Stroke	137	725	18.9	139	725	19.2	0.982 (0.756-1.277)	0.894
Weight loss	21	725	2.9	20	725	2.8	1.051 (0.565-1.957)	0.874
Sepsis	148	725	20.4	152	725	21.0	0.967 (0.75-1.247)	0.795
Recent surgery	5	725	0.7	6	725	0.8	0.832 (0.253-2.739)	0.762
Labs
Creatinine	1.13		0.8	1.11		0.7	1.034 (0.897-1.192)	0.646
Hematocrit	33.3			34.6			0.868 (0.765-0.985)	0.017
Platelet count	210			206			1.067 (0.94-1.211)	0.313
Surgical urgency
Emergent	181	725	25.0	175	725	24.1	1.046 (0.823-1.328)	0.714
Surgical complexity
Work RVU	17.4		2.2	17.5		2.1	0.988 (0.942-1.036)	0.622
Anesthesia
General	562	725	77.5	557	725	76.8	Reference	0.568
Neuraxial/Regional	162	725	22.3	168	725	23.2	0.956 (0.748-1.222)
Other	1	725	0.1	0	725	0.0	1 (-∞-∞)
Anesthesia Time	122.0	NA	49.4	123.6	NA	49.7	0.999 (0.997-1.001)	0.55
Operation Time	63.9	NA	34.0	64.7	NA	36.1	0.999 (0.996-1.002)	0.645
Modified Charlson Score	2.6	NA	1.4	2.59	NA	1.4	1.007 (0.936-1.084)	0.852

DNR: Do-Not-Resuscitate; BMI: Body mass index; SD: Standard deviation; ASA: American Society of Anesthesiologists; COPD: Chronic obstructive pulmonary disease; CHF: Congestive heart failure;CAD: Coronary artery disease; PVD: Peripheral vascular disease; CKD: Chronic kidney disease; RVU: Relative value unit.