Table 1.

Sample Characteristics of Minnesota Adults with Diabetes Observed 2010 to 2017

All Residential LocationsUrban AreasLarge Rural TownsSmall Rural Towns
Patient-year observations, n (%)1,697,173 (100.0)1,158,921 (68.3)219,677 (12.9)318,575 (18.8)
Outcome variables
 HbA1c value, mean (SD)7.3 (1.5)7.3 (1.5)7.3 (1.5)7.3 (1.5)
 HbA1c < 8%, n (%)1,291,705 (76.1)843,928 (77.4)167,064 (76.1)242,604 (76.2)
Patient-Level Characteristics
 Depression, n (%)384,699 (22.7)263,583 (22.7)5,1102 (23.3)7,0014 (22.0)
Patient age (years), n (%)
 18 to 44178,982 (10.6)129,278 (11.2)2,1731 (9.9)2,7973 (8.8)
 45 to 54286,900 (16.9)206,796 (17.8)3,3661 (15.3)4,6443 (14.6)
 55 to 64504,623 (29.7)347,508 (30.0)6,4905 (29.6)9,2210 (28.9)
 65 to 75726,668 (42.8)475,339 (41.0)9,9380 (45.2)151,949 (47.7)
Female, n (%)783,237 (46.2)535,938 (46.2)101,793 (46.3)145,506 (45.7)
Ischemic vascular disease, n (%)291,998 (17.2)188,746 (16.3)4,1128 (18.7)6,2124 (19.5)
Type 1 diabetes, n (%)100,045 (5.9)6,8620 (5.9)1,3199 (6.0)1,8226 (5.7)
Insurance, n (%)
Commercial708,927 (41.8)510,258 (44.0)8,2380 (37.5)116,289 (36.5)
Medicare623,037 (36.7)393,273 (33.9)9,1842 (41.8)137,922 (43.3)
Medicaid143,842 (8.5)108,279 (9.3)1,5744 (7.2)1,9819 (6.2)
Dual Medicare/Medicaid8,0520 (4.7)5,2833 (4.6)1,0471 (4.8)1,7216 (5.4)
No insurance5,4803 (3.2)3,9285 (3.4)5,382 (2.5)1,0136 (3.2)
Unknown8,6044 (5.1)5,4993 (4.8)1,3858 (6.3)1,7193 (5.4)
Practice-Level Characteristics
Certified as a Patient-Centered Medical Home, n (%)462,728 (27.3)329,007 (28.4)5,4507 (24.8)7,9214 (24.9)
Ownership*, n (%)
 Single-site medical group5,6155 (3.3)3,6575 (3.2)4,328 (2.0)1,5252 (4.8)
 Small medical group329,268 (19.4)167,391 (14.4)6,8705 (31.3)9,3172 (29.3)
Large medical group1,311,750 (77.3)954,955 (82.4)146,644 (66.8)210,151 (66.0)
Neighborhood-Level (Patient ZIP Code) American Community Survey Characteristics
 Percent of population White, non-Hispanic, mean (SD)82.3 (15.8)78.5 (16.7)89.3 (8.6)91.3 (10.1)
Educational distribution of adult population, mean (SD)
 Percent with no high school degree8.2 (4.7)7.5 (4.9)8.9 (4.2)10.1 (3.5)
 Percent with high school degree or GED but no 4-year college degree60.9 (11.6)56.9 (11.3)66.6 (6.7)71.3 (5.2)
 Percent with 4-year college degree31.0 (13.4)35.6 (13.1)24.5 (7.6)18.6 (5.7)
 Percent of households under the federal poverty level, mean (SD)11.5 (7.4)11.0 (8.1)12.9 (5.9)12.0 (5.2)
  • * Small medical groups were defined as 2-11 primary care sites; large medical groups were defined as 12 or more primary care sites.

  • Residential locations were mapped from Rural-Urban Commuting Areas.16

  • SD, standard deviation; GED, General educational development tests.