Table 1.
Comparisons of Direct State-Level and County-Level Estimates of the Prevalence of Selected Health Indicators Among Adults Aged ≥18 Years With Weighted and Unweighted Model-Based Estimates, Behavioral Risk Factor Surveillance System, United Statesa, 2011
| Indicator and Type of Estimate |
ρb | No.c | Prevalence Estimate, % |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Minimum | Quartile 1 | Median | Quartile 3 | Maximum | IQRd | Rangee | |||
| State Level | |||||||||
| COPD | |||||||||
| Directf | 51 | 4.01 | 5.22 | 6.06 | 7.68 | 9.85 | 2.46 | 5.84 | |
| Weightedg | 0.997 | 51 | 4.11 | 5.28 | 6.07 | 7.60 | 9.85 | 2.32 | 5.73 |
| Unweightedh | 0.970 | 51 | 3.74 | 5.02 | 5.84 | 7.29 | 9.23 | 2.26 | 5.49 |
| Current smoking | |||||||||
| Direct | 51 | 11.84 | 19.11 | 21.21 | 23.03 | 28.99 | 3.92 | 17.15 | |
| Weighted | 0.998 | 51 | 12.18 | 19.16 | 21.32 | 23.26 | 28.94 | 4.10 | 16.76 |
| Unweighted | 0.970 | 51 | 11.39 | 17.50 | 19.12 | 21.63 | 25.99 | 4.13 | 14.60 |
| Diabetes | |||||||||
| Direct | 51 | 6.69 | 8.42 | 9.51 | 10.38 | 12.35 | 1.96 | 5.66 | |
| Weighted | 0.994 | 51 | 6.65 | 8.45 | 9.48 | 10.17 | 12.39 | 1.72 | 5.74 |
| Unweighted | 0.945 | 51 | 6.32 | 8.23 | 8.99 | 9.88 | 12.61 | 1.65 | 6.29 |
| Obesityi | |||||||||
| Direct | 51 | 20.71 | 25.10 | 27.82 | 29.65 | 34.90 | 4.54 | 14.18 | |
| Weighted | 0.997 | 51 | 20.67 | 25.20 | 27.52 | 29.39 | 34.82 | 4.19 | 14.15 |
| Unweighted | 0.980 | 51 | 19.79 | 24.06 | 27.11 | 29.10 | 33.75 | 5.04 | 13.97 |
| Uninsuredj | |||||||||
| Direct | 51 | 7.73 | 15.61 | 21.27 | 24.95 | 34.62 | 9.35 | 26.90 | |
| Weighted | 0.999 | 51 | 7.77 | 15.62 | 21.04 | 24.72 | 34.44 | 9.10 | 26.67 |
| Unweighted | 0.984 | 51 | 6.73 | 14.91 | 18.58 | 22.50 | 31.55 | 7.58 | 24.82 |
| County Levelk | |||||||||
| COPD | |||||||||
| Direct | 569 | 0.00 | 5.18 | 6.88 | 9.37 | 33.20 | 4.19 | 33.20 | |
| Weighted | 0.941 | 569 | 2.28 | 5.47 | 6.86 | 8.71 | 18.82 | 3.24 | 16.54 |
| Unweighted | 0.852 | 569 | 2.77 | 5.23 | 6.60 | 8.04 | 17.08 | 2.81 | 14.31 |
| Current smoking | |||||||||
| Direct | 1,232 | 0.00 | 18.45 | 23.05 | 28.34 | 55.49 | 9.89 | 55.49 | |
| Weighted | 0.957 | 1,232 | 8.54 | 19.21 | 23.16 | 27.18 | 46.68 | 7.97 | 38.14 |
| Unweighted | 0.787 | 1,232 | 8.09 | 18.24 | 21.14 | 24.03 | 44.17 | 5.80 | 36.08 |
| Diabetes | |||||||||
| Direct | 886 | 2.99 | 8.39 | 10.16 | 12.91 | 28.37 | 4.52 | 25.37 | |
| Weighted | 0.854 | 886 | 3.97 | 8.66 | 10.10 | 11.92 | 20.98 | 3.27 | 17.01 |
| Unweighted | 0.738 | 886 | 4.47 | 8.41 | 9.80 | 11.44 | 19.88 | 3.03 | 15.41 |
| Obesity | |||||||||
| Direct | 1,492 | 7.03 | 25.08 | 29.57 | 34.68 | 69.04 | 9.59 | 62.01 | |
| Weighted | 0.929 | 1,492 | 13.35 | 26.22 | 29.82 | 33.32 | 51.59 | 7.10 | 38.24 |
| Unweighted | 0.731 | 1,492 | 13.77 | 26.24 | 29.02 | 31.73 | 45.41 | 5.49 | 31.64 |
| Uninsured | |||||||||
| Direct | 873 | 4.28 | 17.78 | 23.56 | 29.83 | 63.45 | 12.05 | 59.18 | |
| Weighted | 0.960 | 873 | 4.69 | 18.43 | 23.52 | 28.93 | 60.89 | 10.50 | 56.20 |
| Unweighted | 0.847 | 873 | 5.18 | 17.11 | 21.42 | 25.67 | 62.47 | 8.56 | 57.29 |
Abbreviations: BRFSS, Behavioral Risk Factor Surveillance System; COPD, chronic obstructive pulmonary disease; IQR, interquartile range.
All 50 states and the District of Columbia.
Pearson correlation coefficient.
Number of states or counties included in comparison.
Third quartile minus first quartile.
Difference between the maximum and minimum values.
BRFSS direct survey estimates.
Small area estimates based on the multilevel prevalence models with the BRFSS survey weights in the model-fitting.
Small area estimates based on the multilevel prevalence models without the BRFSS survey weights in the model-fitting.
Obesity was defined as body mass index (weight (kg)/height (m)2) ≥30.
Percentage of adults aged 18–64 years without health insurance.
Limited to counties with at least 50 respondents and their BRFSS direct survey estimates with a coefficient of variation less than 0.30.