Table 5.
Analysis of negative binomial regression model
| Parameter | Regression coefficient | Standard error | Wald chi-square |
P value | RR value | |||
|---|---|---|---|---|---|---|---|---|
| Regression coefficient | 95% confidence interval | RR value | 95% confidence interval | |||||
| Intercept | −871.177 | NA | 172.3236 | 25.56 | < 0.0001 | NA | NA | |
| Year | 0.4341 | (0.2661, 0.6023) | 0.0854 | 25.84 | < 0.0001 | 1.5436 | (1.3049,1.8263) | |
| Number of days from Chinese New Year’s Eve | 0.0267 | (0.0148, 0.0388) | 0.0061 | 19.3 | < 0.0001 | 1.0271 | (1.0149,1.0396) | |
| Week | −0.3378 | (−0.4225, 0.2542) | 0.0428 | 62.41 | < 0.0001 | 0.7133 | (0.6554,0.7755) | |
| Hospitals | SPH | NA | NA | NA | NA | NA | NA | NA |
| QH of SDU | −0.523 | (−0.8475, −0.1986) | 0.1647 | 10.09 | 0.0015 | 0.5927 | (0.4285,0.8199) | |
| AH of SDUTCM | −0.1474 | (−0.4731, 0.1785) | 0.1654 | 0.79 | 0.3728 | 0.8629 | (0.6231,1.1954) | |
SPH Shandong Provincial Hospital, QH of SDU Qilu Hospital of Shandong University, AH of SDUTCM Affiliated Hospital of Shandong University of Traditional Chinese Medicine