Table 1.

Population characteristics.^*

CHARACTERISTICS	MDI† CLINICS (N = 2,578), NO. (%)	NON-MDI CLINICS (N = 2,578), NO. (%)	P VALUE	STANDARD DIFFERENCE
Exact-Matched Variables
Baseline gap type			Not applicable
Preventive alone	1,611 (62.5%)	1,611 (62.5%)		0.00
Disease management alone	538 (20.9%)	538 (20.9%)		0.00
Both types	429 (16.6%)	429 (16.6%)		0.00
Age, mean (SD‡) matched within 5 years	70.9 (5.0)	71.1 (5.1)	.13	0.04
Sex (exact match)
Male (versus female)	1,040 (40.3%)	1,040 (40.3%)	Not applicable	0.00
Propensity-Matched Variables			.02
CCI§ 0	1,351 (52.4%)	1,268 (49.2%)		0.04
CCI 1	450 (17.5%)	517 (20.1%)		0.04
CCI ≥ 2	777 (30.1%)	793 (30.8%)		0.01
Current smoker
Yes (versus no)	158 (6.1%)	151 (5.9%)	.68	0.01
Emergency department use in previous 12 months
Yes (versus no)	398 (15.4%)	434 (16.8%)	.17	0.03
Hospitalization in previous 12 months
Yes (versus no)	166 (6.4%)	202 (7.8%)	.05	0.04
Systemic conditions (% yes)
Diabetes mellitus	707 (27.4%)	719 (27.9%)	.71	0.01
Rheumatoid arthritis	37 (1.4%)	37 (1.4%)	Not applicable	0.00
Cardiovascular disease	263 (10.2%)	304(11.8%)	.07	0.03
Cardiovascular disease	309 (12.0%)	327 (12.7%)	.45	0.01
Hypertension	1,365 (52.9%)	1,385 (53.7%)	.58	0.01
Periodontal disease status			.84
Healthy/early	1,917 (74.4%)	1,936 (75.1%)		0.01
Moderate	451 (17.5%)	430 (16.7%)		0.01
Advanced	82 (3.2%)	78 (3.0%)		0.01
Missing	128 (5.0%)	134 (5.2%)		0.01
Total open gaps at index visit, mean (SD)	1.8 (1.2)	1.8 (1.2)	.84	0.01
Non – Propensity-Matched Variables
Socioeconomic Status: Area Deprivation Index, mean (SD)	4.6 (2.4)	4.5 (2.6)	.36	0.03

^*Population includes population of Medicare patients 65 years or older with 1 or more care gaps at baseline. P value from t test for age, count of open gaps at baseline, and Area Deprivation Index state rank; P value from χ² for all other variables.

^†MDI: Medical-dental integration.

^‡SD: Standard deviation.

^§CCI: Charlson comorbidity index.