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Table 1

Demographic and clinical characteristics of the CGM and non-CGM cohorts

VariableCGMNon-CGM*AllP valueTest
n = 2,625n = 435N = 3,060
Sex    0.067 Pearson χ2 
 Female 1,283 (48.9) 192 (44.1) 1,475 (48.2)   
 Male 1,342 (51.1) 243 (55.9) 1,585 (51.8)   
Age at baseline, mean (SD), years 11.5 (4.1) 13.9 (3.8) 11.8 (4.1) <0.001 Two-sample t test 
Age at diagnosis, mean (SD), years 7.7 (3.9) 8.5 (4.3) 7.9 (4.0) <0.001 Two-sample t test 
Diabetes duration at baseline, years 2.6 (0.3, 6.1) 4.5 (1.9, 8.1) 2.9 (0.3, 6.4) <0.001 Wilcoxon rank sum 
Insulin regimen    <0.001 Pearson χ2 
 MDI 1,113 (49.4) 242 (61.6) 1,355 (51.2)   
 CSII 933 (41.4) 116 (29.5) 1,049 (39.6)   
 BD 201 (8.9) 35 (8.9) 236 (8.9)   
HbA1c at baseline, mean (SD), % 8.3 (1.5) 8.6 (1.9) 8.4 (1.6) <0.001 Two-sample t test 
VariableCGMNon-CGM*AllP valueTest
n = 2,625n = 435N = 3,060
Sex    0.067 Pearson χ2 
 Female 1,283 (48.9) 192 (44.1) 1,475 (48.2)   
 Male 1,342 (51.1) 243 (55.9) 1,585 (51.8)   
Age at baseline, mean (SD), years 11.5 (4.1) 13.9 (3.8) 11.8 (4.1) <0.001 Two-sample t test 
Age at diagnosis, mean (SD), years 7.7 (3.9) 8.5 (4.3) 7.9 (4.0) <0.001 Two-sample t test 
Diabetes duration at baseline, years 2.6 (0.3, 6.1) 4.5 (1.9, 8.1) 2.9 (0.3, 6.4) <0.001 Wilcoxon rank sum 
Insulin regimen    <0.001 Pearson χ2 
 MDI 1,113 (49.4) 242 (61.6) 1,355 (51.2)   
 CSII 933 (41.4) 116 (29.5) 1,049 (39.6)   
 BD 201 (8.9) 35 (8.9) 236 (8.9)   
HbA1c at baseline, mean (SD), % 8.3 (1.5) 8.6 (1.9) 8.4 (1.6) <0.001 Two-sample t test 

Data are presented as n (%), median (interquartile range), or as indicated. MDI defined as basal bolus, long-acting plus rapid insulin with meals; CSII, continuous subcutaneous insulin infusion; BD, twice-daily insulin (NPH/Rapid with breakfast and long acting/rapid with evening meal).

*

The non-CGM cohort is defined as having a clinic visit after 1 April 2017 (CGM subsidy start date) and not registering for CGM.

Baseline age, diabetes duration, and HbA1c for the CGM cohort is defined as the value on the closest clinic visit before the CGM start date and for the non-CGM cohort is defined as the value on the closest clinic visit before 1 April 2017 (when the subsidy became available).

CGM vs. non-CGM.

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