Table 3.
Proportion of RSV hospitalizations by age in months in the National Inpatient Sample Databasea, overall and by RSV season from 2006 through 2011, and the Kids Inpatient Database in 2006 and 2009
| Age in months | NIS | KID | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Across all years (n = 361,685) | November 2006–March 2007 (n = 58,958) | November 2007–March 2008 (n = 58,872) | November 2008–March 2009 (n = 50,893) | November 2009–March 2010 (n = 58,560) | November 2010–March 2011 (n = 52,265) | 2006 and 2009 (n = 136,344) | ||||||||
| Weighted n | % (95% CI) | Weighted n | % (95% CI) | Weighted n | % (95% CI) | Weighted n | % (95% CI) | Weighted n | % (95% CI) | Weighted n | % (95% CI) | Weighted n | % (95% CI) | |
| <1 | 52,310 | 14.5% (13.9–15.0) | 8543 | 14.5% (13.5–15.5) | 8464 | 14.4% (13.5–15.3) | 7648 | 15.0% (13.7–16.3) | 8220 | 14% (13.0–15.1) | 7089 | 13.6% (12.5–14.6) | 20,119 | 14.8% (14.3–15.3) |
| 1 to <2 | 76,545 | 21.2% (20.6–21.7) | 12,357 | 21.0% (19.9–22.0) | 12,858 | 21.8% (20.7–23.0) | 10,431 | 20.5% (19.5–21.5) | 11,969 | 20.4% (19.5–21.4) | 11,369 | 21.8% (20.2–23.3) | 29,067 | 21.3% (20.9–21.8) |
| 2 to <3 | 50,606 | 14.0% (13.7–14.3) | 8315 | 14.1% (13.4–14.8) | 8311 | 14.1% (13.3–14.9) | 6947 | 13.6% (12.9–14.4) | 8120 | 13.9% (13.1–14.7) | 7317 | 14% (13.3–14.7) | 19,444 | 14.3% (13.9–14.6) |
| 3 to <4 | 35,934 | 9.9% (9.7–10.2) | 6076 | 10.3% (9.7–10.9) | 5921 | 10.1% (9.5–10.7) | 5065 | 10% (9.2–10.7) | 5636 | 9.6% (9.1–10.2) | 5436 | 10.4% (9.6–11.2) | 13,110 | 9.6% (9.4–9.9) |
| 4 to <5 | 30,123 | 8.3% (8.1–8.6) | 5332 | 9.0% (8.4–9.7) | 4876 | 8.3% (7.6–9.0) | 4273 | 8.4% (7.7–9.1) | 4561 | 7.8% (7.3–8.3) | 4207 | 8.1% (7.4–8.7) | 11,176 | 8.2% (8.0–8.4) |
| 5 to <6 | 25,036 | 6.9% (6.7–7.2) | 4051 | 6.9% (6.2–7.5) | 4062 | 6.9% (6.3–7.5) | 3464 | 6.8% (6.1–7.5) | 4323 | 7.4% (6.8–8.0) | 3664 | 7.0% (6.3–7.7) | 9145 | 6.7% (6.5–6.9) |
| 6 to <7 | 21,280 | 5.9% (5.6–6.1) | 3282 | 5.6% (5.0–6.1) | 3318 | 5.6% (5.1–6.2) | 3147 | 6.2% (5.6–6.8) | 3503 | 6.0% (5.5–6.4) | 3058 | 5.9% (5.3–6.4) | 7991 | 5.9% (5.7–6.1) |
| 7 to <8 | 18,068 | 5.0% (4.8–5.2) | 3098 | 5.3% (4.8–5.7) | 2851 | 4.8% (4.4–5.3) | 2486 | 4.9% (4.4–5.3) | 3057 | 5.2% (4.8–5.6) | 2376 | 4.5% (4.1–5.0) | 6866 | 5.0% (4.8–5.2) |
| 8 to <9 | 15,171 | 4.2% (4.0–4.4) | 2163 | 3.7% (3.3–4.1) | 2535 | 4.3% (3.8–4.8) | 2121 | 4.2% (3.7–4.7) | 2679 | 4.6% (4.2–5.0) | 2253 | 4.3% (3.8–4.8) | 5583 | 4.1% (3.9–4.3) |
| 9 to <10 | 13,063 | 3.6% (3.4–3.8) | 2101 | 3.6% (3.2–4.0) | 2081 | 3.5% (3.1–4.0) | 1894 | 3.7% (3.3–4.1) | 2152 | 3.7% (3.3–4.1) | 1827 | 3.5% (3.0–3.9) | 5024 | 3.7% (3.5–3.9) |
| 10 to <11 | 12,297 | 3.4% (3.2–3.6) | 1888 | 3.2% (2.8–3.6) | 1880 | 3.2% (2.8–3.6) | 1742 | 3.4% (3.0–3.9) | 2258 | 3.9% (3.5–4.3) | 1901 | 3.6% (3.2–4.1) | 4775 | 3.5% (3.3–3.7) |
| 11–12 | 11,252 | 3.1% (3.0–3.3) | 1751 | 3.0% (2.6–3.3) | 1715 | 2.9% (2.5–3.3) | 1676 | 3.3% (2.9–3.7) | 2082 | 3.6% (3.2–3.9) | 1768 | 3.4% (3.0–3.8) | 4044 | 3.0% (2.8–3.1) |
CI confidence interval, KID Kids Inpatient Database, NIS National Inpatient Sample, RSV respiratory syncytial virus, wGA weeks gestational age
aAfter excluding the states (Florida, Massachusetts, Maine, New Hampshire, South Carolina, and Texas) with missing “age in days” variable, discharge weights were rescaled to match the national estimate of discharges