Table 3.
Seasonality overall results for U.S. data normalized for the population based controls.
| White Americans | African Americans | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| MOB | Obs | Exp | Obs/Exp (95% CI) | Month specific χ2 | p value | Obs | Exp | Obs/Exp (95% CI) | Month specific χ2 | p value |
| chisq(11) = 33.16, p < 0.0001 | chisq(11) = 16.30, p = 0.1304 | |||||||||
| January | 4178 | 4291 | 0.97[0.94;1] | 3.251 | 0.07137 | 458 | 452 | 1.01[0.92;1.1] | 0.087 | 0.7681 |
| February | 3894 | 4034 | 0.97[0.94;1] | 5.279 | 0.021582 | 403 | 431 | 0.94[0.85;1.03] | 1.978 | 0.1596 |
| March | 4405 | 4402 | 1[0.97;1.03] | 0.002 | 0.962259 | 460 | 480 | 0.96[0.87;1.05] | 0.915 | 0.33876 |
| April | 4033 | 4069 | 0.99[0.96;1.02] | 0.346 | 0.556199 | 423 | 441 | 0.96[0.87;1.05] | 0.8 | 0.37097 |
| May | 4152 | 4140 | 1[0.97;1.03] | 0.038 | 0.845688 | 411 | 443 | 0.93[0.84;1.02] | 2.519 | 0.1125 |
| June | 4255 | 4027 | 1.06[1.03;1.09] | 14.024 | 0.000181 | 425 | 424 | 1[0.9;1.1] | 0.003 | 0.9596 |
| July | 4480 | 4318 | 1.04[1.01;1.07] | 6.644 | 0.009948 | 504 | 453 | 1.11[1.01;1.21] | 6.271 | 0.0123 |
| August | 4537 | 4480 | 1.01[0.98;1.04] | 0.796 | 0.372414 | 494 | 481 | 1.03[0.94;1.12] | 0.386 | 0.5345 |
| September | 4425 | 4416 | 1[0.97;1.03] | 0.016 | 0.8997 | 463 | 464 | 1[0.91;1.09] | 0.002 | 0.96 |
| October | 4175 | 4312 | 0.97[0.94;1] | 4.758 | 0.0291 | 483 | 441 | 1.1[1;1.2] | 4.358 | 0.037 |
| November | 4030 | 4016 | 1[0.97;1.03] | 0.053 | 0.8179 | 394 | 407 | 0.97[0.87;1.07] | 0.449 | 0.5027 |
| December | 4086 | 4145 | 0.99[0.96;1.02] | 0.915 | 0.33888 | 452 | 454 | 1[0.91;1.09] | 0.01 | 0.92 |