Table 1.
The M/F ratio and number of patients with 2009 pandemic influenza A H1N1, reported from fixed sentinel points from the 31st week of 2009 through the 12th week of 2010.
Table 2.
The M/F ratio and number of patients with seasonal influenza, reported from fixed sentinel points in 2005.
Figure 1.
Historical view of reported cases of influenza-like illness in Japan by week of illness onset.
The horizontal axis shows the year by week, beginning with the 27th week of one year and going through the 26th week of the next. The solid bold line indicates the number of cases per week at sentinel points in 2009. Data from cases of seasonal influenza in other years are indicated by thin lines.
Figure 2.
The number of cases (per 100,000 population) of influenza and the M/F ratio reported from sentinel points in Japan.
The number of cases (left axis) and the M/F ratio (right axis) for seasonal influenza in 2005 (A) and for pdmH1N1 influenza in 2009 (B) reported from the sentinel points are illustrated. M/F ratios associated with pdmH1N1 (2009, solid bold line) and seasonal influenza (2000–2008, thin lines) are compared (C). 95% confidence intervals for M/F ratios are indicated by error bars. Horizontal lines indicate M/F ratio of 1. *: Significance with the Bonferroni's correction ().
Table 3.
Comparison of the M/F ratios by age for 2009 pdmH1N1 with that for 2005 seasonal influenza.