Searching for Sharp Drops in the Incidence of Pandemic A/H1N1 Influenza by Single Year of Age
Figure 3
Differences by sex in hospitalized cases.
A Hospitalized Men. The smoothed risk ratio of laboratory confirmed hospitalized cases among men in a single year age group compared to the overall risk in all male age groups. Smoothed curves were created by a locally weighted polynomial regression with fixed bandwidth of 4. The single year of age weighted risk ratios used to create the smoothed curve are plotted as open circles and the 95% confidence bounds are shaded. The inset figure shows the truncated WRR from 0 to 29 years of age while the larger figure focuses on the ages from 30–100. B Hospitalized Men. SiZer plot of the second derivative of the weighted risk ratio by age among male hospitalized cases. C Hospitalized Women. The smoothed risk ratio of laboratory confirmed hospitalized cases among women in a single year of age compared to the overall risk in all female age groups. Smoothed curves were created by a locally weighted polynomial regression with fixed bandwidth of 4. The single year of age weighted risk ratios used to create the smoothed curve are plotted as open circles and the 95% confidence bounds are shaded. The inset figure shows the truncated WRR from 0 to 29 years of age while the larger figure focuses on the ages from 30–100. D Hospitalized Women. SiZer plot of the second derivative of the weighted risk ratio by age among female hospitalized cases.