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-Hispanic0.553 (0.188)*0.175 to 0.9310.495 (0.171)*0.152 to 0.839
Hispanic0.424 (0.267)−0.114 to 0.9630.500 (0.264)−0.032 to 1.032
Other0.660 (0.284)*0.087 to 1.2320.575 (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 school0.263 (0.213)−0.165 to 0.6920.208 (0.194)−0.182 to 0.599
High school0.041 (0.188)−0.338 to 0.4210.049 (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 <$20K0.075 (0.158)−0.244 to 0.3940.079 (0.147)−0.217 to 0.375
Duration 5–14 years0.626 (0.205)*0.213 to 1.040.428 (0.205)*0.015 to 0.84
Duration 15+ years0.472 (0.216)*0.036 to 0.9080.099 (0.229)−0.363 to 0.561
Diabetes pills only0.949 (0.182)*0.582 to 1.317
Insulin only1.658 (0.237)*1.18 to 2.137
Diabetes pills and insulin1.564 (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
Constant9.662 (1.042)*7.563 to 11.7619.123 (0.902)*7.305 to 10.941
n1,1321,129
R20.1180.196
  • * Significant at P < 0.05.