Fig. 3

Data from the “Osservatorio” database: comparison between hospitalized (H⁺) and not hospitalized (H⁻) children. a On the ordinate, the number of H⁺ and H⁻ infants evaluated with a chronological age ≤6 months (mo) are shown and, on the abscissa, the three weeks’ gestational age (wGA) groups. The H⁺-to- H⁻ ratios in the three wGA groups are also included in the figure (*). Positive hospitalized-to-not-hospitalized ratios were detected in all wGA groups, with no statistically significant difference (p = 0.94). b On the ordinate the percentage of H⁺ and H⁻ infants that were RSV+ or RSV- are shown and, on the abscissa, the three wGA groups. c and d. The same data in children evaluated with a chronological age 6- > 12 mo are shown