Table 2.
Correlation Coefficients Between Original Preventive Services Index and RxRisk,a and Component Index Variables, Silver Sneakers and EnhanceFitness Programs, 1997-2004 (N = 38,046)b
| Preventive Services in Past 2 Years | Influenza Vaccination | Pneumococcal Vaccination | Colon Cancer Screening | PSA | Mammo- gram | Preventive Office Visit | Preventive Services Index |
|---|---|---|---|---|---|---|---|
| Pneumococcal vaccination | 0.310 | ||||||
| Colon cancer screening | 0.549 | 0.255 | |||||
| PSA (n = 14,443) | 0.337 | 0.200 | 0.316 | ||||
| Mammogram (n = 23,603) | 0.237 | 0.086 | 0.199 | ||||
| Preventive office visit | 0.688 | 0.359 | 0.554 | 0.518 | 0.214 | ||
| Preventive services indexc | 0.844 | 0.487 | 0.752 | 0.592 | 0.559 | 0.737 | |
| RxRisk | −0.047 | −0.066 | −0.074 | −0.090 | −0.038 | −0.113 | −0.083 |
Abbreviations: PSA, prostate-specific antigen.
RxRisk is expressed as predicted 6-month costs and is a measure of comorbidity based on age, sex, and pharmacy use for the 6 months before enrollment in either fitness program.
The Pearson correlation was used to calculate P values; P was significant at <.001 for all correlations.
Preventive services index is the total number of preventive services that a person used in the 2 years before the index date (colon cancer screening [fecal occult blood test or flexible sigmoidoscopy], screening mammogram, prostate cancer screening, influenza vaccination, or pneumococcal vaccination) (range, 0–8).