Table 1.
Weeks to epidemic onset (starting from July 1) and cumulative incidence (with 95% confidence interval) comparison between the average of the first 4 monitoring years (2009 to 2013) and the 2013/2014 monitoring year
| 4 year average (95% CI) | 2013/2014 | P-value | |
|---|---|---|---|
| Number of weeks until epidemic: | 15.3 | 18.3 | — |
| Cumulative incidence (count of cases) | |||
| July–Sept (Q1) | 8 (7.74–8.26) | 5 | 0.3284 |
| Oct–Dec (Q2) | 60 (58.25–61.75) | 31 | 0.0046 |
| Jan–Mar (Q3) | 30 (28.30–31.70) | 15 | 0.0221 |
| Apr–Jun (Q4) | 14 (13.35–14.65) | 11 | 0.7702 |
| July–Dec (Q1–Q2) | 68 (66.24–69.76) | 36 | 0.0045 |
| July–Mar (Q1–Q3) | 98 (96.15–99.85) | 51 | 0.0018 |
| July–Jun (Q1–Q4) | 112 (109.79–114.21) | 62 | 0.0039 |