Table 2.

Baseline characteristics within the matched population.

	ICC group	Matched non-ICC group∗	Absolute standardized differences†
Number of patients	N = 76	N = 76
Male sex, n (%)	38 (50.00)	38 (50.00)	0.00
Age, mean (SD)	73.62 (9.18)	74.49 (9.90)	0.09
N per quarter (proxy for seasonality), n (%)
FYQ1	18 (23.68)	15 (19.74)	0.10
FYQ2	17 (22.37)	18 (23.68)	0.03
FYQ3	17 (22.37)	17 (22.37)	0.00
FYQ4	24 (31.58)	26 (34.21)	0.06
Prior admission in the 60 days prior to baseline
No admission, n (%)	47 (61.84)	47 (61.84)	0.00
1 prior admission, n (%)	23 (30.26)	22 (28.95)	0.03
2 or more prior admissions, n (%)	6 (7.89)	7 (9.21)	0.05
N of admission in the 60 days prior to baseline admission, mean (SD)	0.49 (0.72)	0.49 (0.70)	0.00

FYQ, fiscal year quarter; N, number; SD, standard deviation. ^∗The comparator group within this table was composed of eligible non-ICC patients that were propensity score-matched to an ICC patient. Patients were matched on patients' gender, age, the fiscal quarter in which they were discharged from the hospital for a COPD admission, and number of prior admissions in the last 60 days. ^†Absolute standardized differences > 0.10 are generally assumed to indicate lack of balance between groups.