Table 4

Percent time in range (70–180 mg/dL) by group according to baseline factors

CGM-only group (n = 148)*CGM+BGM group (n = 76)*
nBaseline26-Week study periodnBaseline26-Week study periodP value for interaction
Age0.08
 <50 years9460 ± 1360 ± 134565 ± 1365 ± 13
 ≥50 years5468 ± 1267 ± 123164 ± 1165 ± 9
Diabetes duration0.74
 <25 years8762 ± 1363 ± 124167 ± 1266 ± 11
 ≥25 years6163 ± 1463 ± 143562 ± 1363 ± 12
Education0.71
 Less than bachelor’s degree3459 ± 1459 ± 131265 ± 963 ± 11
 Bachelor’s degree or higher11364 ± 1364 ± 136166 ± 1365 ± 11
CGM use before study
 Never used 2564 ± 1265 ± 101465 ± 1063 ± 130.26
 In past, but not current5458 ± 1357 ± 142462 ± 1463 ± 13
 Current Dexcom user4967 ± 1267 ± 122869 ± 1268 ± 10
 Current Medtronic user2064 ± 1363 ± 111059 ± 861 ± 7
Baseline HbA1c0.20
 <7.5% (58 mmol/mol)10867 ± 1166 ± 116069 ± 1068 ± 9
 ≥7.5% (58 mmol/mol)4051 ± 1052 ± 121650 ± 952 ± 10
Baseline time in range (70–180 mg/dL)0.39
 <60%6150 ± 853 ± 112451 ± 754 ± 9
 ≥60%8772 ± 869 ± 105272 ± 869 ± 9
  • Data are mean ± SD unless otherwise noted.

  • *One participant in the CGM-only group and one in the CGM+BGM group never came in for a follow-up visit and therefore had no CGM data;

  • P values obtained by including an interaction term in each ANCOVA model adjusted for baseline value and site as a random effect. Continuous variable used in the models for age, duration, HbA1c, and baseline time in range;

  • ‡education missing for one participant in the CGM-only group and three participants in the CGM+BGM group.