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Table 3—

Multivariate regression results: effects of demographic factors and NHANES wave on A1C

No treatment variables included
Treatment variables included
Coefficient (SE)95% CICoefficient (SE)95% CI
Age −0.024 (0.008)* −0.039 to −0.008 −0.022 (0.007)* −0.036 to −0.008 
Black non-Hispanic 0.553 (0.188)* 0.175 to 0.931 0.495 (0.171)* 0.152 to 0.839 
Hispanic 0.424 (0.267) −0.114 to 0.963 0.500 (0.264) −0.032 to 1.032 
Other 0.660 (0.284)* 0.087 to 1.232 0.575 (0.263)* 0.044 to 1.105 
Female −0.168 (0.150) −0.471 to 0.135 −0.156 (0.137) −0.431 to 0.119 
<High school 0.263 (0.213) −0.165 to 0.692 0.208 (0.194) −0.182 to 0.599 
High school 0.041 (0.188) −0.338 to 0.421 0.049 (0.169) −0.292 to 0.39 
BMI −0.020 (0.013) −0.046 to 0.005 −0.026 (0.011)* −0.049 to −0.003 
Insured −0.519 (0.343) −1.21 to 0.171 −0.624 (0.329) −1.286 to 0.038 
Income <$20K 0.075 (0.158) −0.244 to 0.394 0.079 (0.147) −0.217 to 0.375 
Duration 5–14 years 0.626 (0.205)* 0.213 to 1.04 0.428 (0.205)* 0.015 to 0.84 
Duration 15+ years 0.472 (0.216)* 0.036 to 0.908 0.099 (0.229) −0.363 to 0.561 
Diabetes pills only —  0.949 (0.182)* 0.582 to 1.317 
Insulin only —  1.658 (0.237)* 1.18 to 2.137 
Diabetes pills and insulin —  1.564 (0.263)* 1.033 to 2.095 
NHANES 2001–2002 −0.308 (0.234) −0.78 to 0.164 −0.317 (0.194) −0.708 to 0.073 
NHANES 2003–2004 −0.511 (0.222)* −0.959 to −0.063 −0.500 (0.164)* −0.830 to −0.169 
Constant 9.662 (1.042)* 7.563 to 11.761 9.123 (0.902)* 7.305 to 10.941 
n 1,132  1,129  
R2 0.118  0.196  
No treatment variables included
Treatment variables included
Coefficient (SE)95% CICoefficient (SE)95% CI
Age −0.024 (0.008)* −0.039 to −0.008 −0.022 (0.007)* −0.036 to −0.008 
Black non-Hispanic 0.553 (0.188)* 0.175 to 0.931 0.495 (0.171)* 0.152 to 0.839 
Hispanic 0.424 (0.267) −0.114 to 0.963 0.500 (0.264) −0.032 to 1.032 
Other 0.660 (0.284)* 0.087 to 1.232 0.575 (0.263)* 0.044 to 1.105 
Female −0.168 (0.150) −0.471 to 0.135 −0.156 (0.137) −0.431 to 0.119 
<High school 0.263 (0.213) −0.165 to 0.692 0.208 (0.194) −0.182 to 0.599 
High school 0.041 (0.188) −0.338 to 0.421 0.049 (0.169) −0.292 to 0.39 
BMI −0.020 (0.013) −0.046 to 0.005 −0.026 (0.011)* −0.049 to −0.003 
Insured −0.519 (0.343) −1.21 to 0.171 −0.624 (0.329) −1.286 to 0.038 
Income <$20K 0.075 (0.158) −0.244 to 0.394 0.079 (0.147) −0.217 to 0.375 
Duration 5–14 years 0.626 (0.205)* 0.213 to 1.04 0.428 (0.205)* 0.015 to 0.84 
Duration 15+ years 0.472 (0.216)* 0.036 to 0.908 0.099 (0.229) −0.363 to 0.561 
Diabetes pills only —  0.949 (0.182)* 0.582 to 1.317 
Insulin only —  1.658 (0.237)* 1.18 to 2.137 
Diabetes pills and insulin —  1.564 (0.263)* 1.033 to 2.095 
NHANES 2001–2002 −0.308 (0.234) −0.78 to 0.164 −0.317 (0.194) −0.708 to 0.073 
NHANES 2003–2004 −0.511 (0.222)* −0.959 to −0.063 −0.500 (0.164)* −0.830 to −0.169 
Constant 9.662 (1.042)* 7.563 to 11.761 9.123 (0.902)* 7.305 to 10.941 
n 1,132  1,129  
R2 0.118  0.196  
*

Significant at P < 0.05.

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