Table 1.
Model Parameters of CA-CDI Association With 10% Increase in Oral Outpatient Antibiotic Prescribing, Adjusted for Gender, Race, and Use of Molecular Diagnostic Assays, Among Adults (≥20 Years Old), in Emerging Infections Program Surveillance Sites*
| Variable | Coefficient | Standard Error | Rate Ratio | 95% CI | P Value |
|---|---|---|---|---|---|
| Age 20–64 y | — | — | 1.00 (reference) | — | — |
| Age 65+ | 0.938 | 0.087 | 2.55 | 2.15–3.03 | <.0001 |
| Non-white race | — | — | 1.00 (reference) | — | — |
| White race | 0.339 | 0.071 | 1.4 | 1.22–1.61 | <.0001 |
| Male | 0.000 | — | 1.00 (reference) | — | — |
| Female | 0.194 | 0.088 | 1.21 | 1.02–1.44 | .028 |
| Nucleic acid amplification testing use increased by 10% | 0.065 | 0.028 | 1.07 | 01.01–1.13 | .019 |
| Antibiotic prescribing increased by 10% | 0.183 | 0.062 | 1.2 | 1.06–1.36 | .003 |
Abbreviations: CA-CDI, community-associated Clostridium difficile infections; CI, confidence interval.
*Generalized χ2/degree of freedom: 0.91.