Table 2.
Risk ratio of developing type 1 diabetes within 180 days after influenza infection to developing type 1 diabetes within the control period (n = 10,400)
| Within 180 days | Risk ratio of type 1 diabetes | 95% confidence interval | P‐value | |
|---|---|---|---|---|
| 1.30 | 1.15 | 1.46 | <0.001 | |
| Control period | Reference | – | – | – |
| The first year of observation | 1.03 | 0.93 | 1.14 | 0.53 |
| The second year of observation | 0.98 | 0.89 | 1.09 | 0.75 |
| The third year of observation | Reference | – | – | – |
| Seasons | ||||
| Fall | 1.05 | 0.92 | 1.20 | 0.45 |
| Winter | 1.29 | 1.15 | 1.46 | <0.001 |
| Spring | 1.26 | 1.11 | 1.42 | <0.001 |
| Summer | Reference | – | – | – |
We analyzed the data of 10,400 patients with new‐onset type 1 diabetes, including 2,196 (952 male 1,244 female) patients diagnosed with influenza between 1 September 2014 and 31 August 2017.