Table 1

Factors associated with temporal changes in A1C ≤7.0% achievement

Unadjusted OR (95% CI)PAdjusted OR (95% CI)P
Men vs. women 0.996 (0.992–1.076) 0.93   
Age (per 5 years higher) 1.029 (1.012–1.045) 0.0006 1.024 (1.003–1.046) 0.0235 
Ethnicity (Caucasian as reference)     
East and South-East Asian 0.764 (0.667–0.874) <0.0001 0.715 (0.606–0.842) <0.0001 
South Asian 0.592 (0.500–0.701) <0.0001 0.641 (0.528–0.779) <0.0001 
Black 0.651 (0.519–0.816) 0.0002 0.71 (0.548–0.920) 0.0095 
Aboriginal Canadian native/Inuit 0.699 (0.517–0.945) 0.02 0.867 (0.604–1.244) 0.44 
Others 0.945 (0.710–1.260) 0.701 0.903 (0.657–1.241) 0.53 
Unknown 0.670 (0.512–0.876) 0.0035 0.651 (0.464–0.913) 0.0129 
Insurance coverage (private vs. public) 0.979 (0.895–1.070) 0.64   
Baseline A1C (per 1% lower) 1.368 (1.301–1.438) <0.0001 1.344 (1.273–1.419) <0.0001 
LDL cholesterol (per 1 mmol/l lower)* 1.412 (1.340–1.487) <0.0001 1.349 (1.275–1.427) <0.0001 
Systolic blood pressure (per 10 mmHg lower)* 1.121 (1.093–1.151) <0.0001 1.101 (1.063–1.140) <0.0001 
Diastolic blood pressure (per 10 mmHg lower)* 1.202 (1.154–1.251) <0.0001 1.09 (1.031–1.153) 0.0024 
Baseline BMI (per 5 kg/m2 lower) 1.041 (1.013–1.071) 0.0044 1.044 (1.008–1.081) 0.0158 
Duration of type 2 diabetes (per 5 years lower) 1.239 (1.193–1.287) <0.0001 1.451 (1.375–1.532) <0.0001 
Smoker (No vs. Yes) 1.071 (0.948–1.210) 0.27   
Exercise vs. sedentary lifestyle 1.033 (0.956–1.115) 0.41   
Family history of diabetes (No vs. Yes) 1.086 (1.007–1.172) 0.033   
Pharmacotherapy     
Number of AHAs (per unit lower)* 1.176 (1.129–1.224) <0.0001 1.326 (1.256–1.399) <0.0001 
Statin (Yes vs. No) 1.223 (1.112–1.344) <0.0001   
ACE inhibitor (Yes vs. No) 1.052 (0.976–1.135) 0.19   
ARB (Yes vs. No)* 1.241 (1.145–1.346) <0.0001 1.246 (1.133–1.370) <0.0001 
β-blocker (Yes vs. No) 1.090 (0.993–1.198) 0.072   
Unadjusted OR (95% CI)PAdjusted OR (95% CI)P
Men vs. women 0.996 (0.992–1.076) 0.93   
Age (per 5 years higher) 1.029 (1.012–1.045) 0.0006 1.024 (1.003–1.046) 0.0235 
Ethnicity (Caucasian as reference)     
East and South-East Asian 0.764 (0.667–0.874) <0.0001 0.715 (0.606–0.842) <0.0001 
South Asian 0.592 (0.500–0.701) <0.0001 0.641 (0.528–0.779) <0.0001 
Black 0.651 (0.519–0.816) 0.0002 0.71 (0.548–0.920) 0.0095 
Aboriginal Canadian native/Inuit 0.699 (0.517–0.945) 0.02 0.867 (0.604–1.244) 0.44 
Others 0.945 (0.710–1.260) 0.701 0.903 (0.657–1.241) 0.53 
Unknown 0.670 (0.512–0.876) 0.0035 0.651 (0.464–0.913) 0.0129 
Insurance coverage (private vs. public) 0.979 (0.895–1.070) 0.64   
Baseline A1C (per 1% lower) 1.368 (1.301–1.438) <0.0001 1.344 (1.273–1.419) <0.0001 
LDL cholesterol (per 1 mmol/l lower)* 1.412 (1.340–1.487) <0.0001 1.349 (1.275–1.427) <0.0001 
Systolic blood pressure (per 10 mmHg lower)* 1.121 (1.093–1.151) <0.0001 1.101 (1.063–1.140) <0.0001 
Diastolic blood pressure (per 10 mmHg lower)* 1.202 (1.154–1.251) <0.0001 1.09 (1.031–1.153) 0.0024 
Baseline BMI (per 5 kg/m2 lower) 1.041 (1.013–1.071) 0.0044 1.044 (1.008–1.081) 0.0158 
Duration of type 2 diabetes (per 5 years lower) 1.239 (1.193–1.287) <0.0001 1.451 (1.375–1.532) <0.0001 
Smoker (No vs. Yes) 1.071 (0.948–1.210) 0.27   
Exercise vs. sedentary lifestyle 1.033 (0.956–1.115) 0.41   
Family history of diabetes (No vs. Yes) 1.086 (1.007–1.172) 0.033   
Pharmacotherapy     
Number of AHAs (per unit lower)* 1.176 (1.129–1.224) <0.0001 1.326 (1.256–1.399) <0.0001 
Statin (Yes vs. No) 1.223 (1.112–1.344) <0.0001   
ACE inhibitor (Yes vs. No) 1.052 (0.976–1.135) 0.19   
ARB (Yes vs. No)* 1.241 (1.145–1.346) <0.0001 1.246 (1.133–1.370) <0.0001 
β-blocker (Yes vs. No) 1.090 (0.993–1.198) 0.072   

*Time-dependent variables. OR, odds ratio.

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