Determining the influence of the primary and specialist network of care on patient and system outcomes among patients with a new diagnosis of chronic obstructive pulmonary disease (COPD)

Table 4 Health care utilization during the 5 years of follow up: between patients with low vs high COC scores

Number of COPD patients		All		Standardized difference
		Low COCI	High COCI*
		N = 227,082	N = 223,755
Number of hospital admissions (any cause)	0	106,548 (46.9%)	139,766 (62.5%)	0.34
	1 to 5	108,796 (47.9%)	81,151 (36.3%)
	6 to 10	9,702 (4.3%)	2,551 (1.1%)
	> 10	2,036 (0.9%)	287 (0.1%)
Mean number of hospital admissions per patient		1.42 ± 2.27	0.72 ± 1.32	0.38
Number hospital admissions (COPD related)	0	192,655 (84.8%)	205,209 (91.7%)	0.22
	1 to 5	33,071 (14.6%)	18,330 (8.2%)
	6 to 10	1,170 (0.5%)	193 (0.1%)
	> 10	186 (0.1%)	23 (0.0%)
Mean number of hospital admission per patient (COPD related)		0.29 ± 0.97	0.12 ± 0.52	0.21
Discharge due to death		24,402 (10.7%)	12,845 (5.7%)	0.18
30 day readmission		28,547 (12.6%)	11,282 (5.0%)	0.27
Number of ER visits (any cause)	0	35,222 (15.5%)	69,998 (31.3%)	0.53
	1 to 5	121,728 (53.6%)	127,314 (56.9%)
	6 to 10	41,059 (18.1%)	19,578 (8.7%)
	> 10	29,073 (12.8%)	6,865 (3.1%)
Number of ER visits (COPD related)	0	197,352 (86.9%)	207,855 (92.9%)	0.23
	1 to 5	27,924 (12.3%)	15,603 (7.0%)
	6 to 10	1,368 (0.6%)	244 (0.1%)
	> 10	438 (0.2%)	53 (0.0%)
Number of ER visits with hospital admission	0	126,031 (55.5%)	164,177 (73.4%)	0.37
	1 to 5	92,249 (40.6%)	57,884 (25.9%)
	6 to 10	7,213 (3.2%)	1,527 (0.7%)
	> 10	1,589 (0.7%)	167 (0.1%)

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