Table 2 Predictors of testing prevalence and positive test prevalence over time
Total Tests / Populationa | ||||||
Timeframe | March 2nd to April 6th | April 6th to May 12th | May 12th to July 6th | |||
IRRunadj (95% Confidence Limits) | IRRadj (95% Confidence Limits) | IRRunadj (95% Confidence Limits) | IRRadj (95% Confidence Limits) | IRRunadj (95% Confidence Limits) | IRRadj (95% Confidence Limits) | |
White residents (%) | 1.0003 (1.0003–1.0003) | 1.0003 (1.0003–1.0004) | 1.000 (0.999–1.000) | 0.999 (0.999–1.000) | 1.0003 (1.0003–1.0003) | 1.000 (0.999–1.000) |
Hispanic composition (%) | 0.999 (0.999–1.000) | 1.0001 (1.0001–1.0002) | 0.999 (0.999–1.000) | 1.000 (0.999–1.000) | 0.999 (0.998–0.999) | 1.000 (0.999–1.000) |
Median age (years) | 1.001 (1.000–1.001) | 1.0007 (1.0005–1.0009) | 1.004 (1.002–1.006) | 1.005 (1.003–1.007) | 1.004 (1.003–1.005) | 1.004 (1.002–1.005) |
COVID risk index quartiles | 1.002 (0.996–1.009) | 1.038 (1.029–1.046) | 1.038 (0.971–1.109) | 1.017 (0.939-1.101) | 0.834 (0.797–0.875) | 0.862 (0.814–0.913) |
Positive Tests / Total Testsb | ||||||
Timeframe | March 2nd to April 6th | April 6th to May 12th | May 12th to July 6th | |||
IRRunadj (95% Confidence Limits) | IRRadj (95% Confidence Limits) | IRRunadj (95% Confidence Limits) | IRRadj (95% Confidence Limits) | IRRunadj (95% Confidence Limits) | IRRadj (95% Confidence Limits) | |
White residents (%) | 1.000 (0.999–1.000) | 0.999 (0.999–0.999) | 0.999 (0.999–1.000) | 0.999 (0.999–0.999) | 0.999 (0.999–0.999) | 0.999 (0.998–0.999) |
Hispanic composition (%) | 1.000 (1.000–1.000) | 1.000 (0.999–1.000) | 1.001 (1.000–1.001) | 1.000 (1.000–1.000) | 1.001 (1.001–1.002) | 1.000 (1.000–1.000) |
Median age (years) | 0.999 (0.999–1.000) | 0.999 (0.999–1.000) | 1.000 (0.999–1.000) | 1.001 (1.001–1.002) | 0.998 (0.997 – 0.999) | 1.001 (0.998–1.003) |
COVID risk index quartiles | 1.056 (1.037–1.077) | 1.010 (0.987–1.034) | 1.108 (1.083–1.133) | 1.031 (1.002–1.060) | 1.248 (1.164–1.338) | 1.135 (1.042–1.237) |