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Volume 16, Number 8—August 2010

Research

Pandemic (H1N1) 2009 Surveillance for Severe Illness and Response, New York, New York, USA, April–July 2009

Sharon Balter, Leena S. Gupta, Sungwoo Lim, Jie Fu, Sharon E. PerlmanComments to Author , and for the New York City 2009 H1N1 Flu Investigation Team
Author affiliations: New York City Department of Health and Mental Hygiene, New York, New York, USA

Main Article

Table

Demographic characteristics of patients hospitalized with confirmed or probable pandemic (H1N1) 2009, New York, NY, USA, April 24–July 7, 2009*

Characteristic
No. (%) patients with 
confirmed or probable 
pandemic (H1N1) 2009
% All residents of city†
Crude rate/100,000 residents (95% CI)
Age-adjusted rate/ 100,000 residents (95% CI)‡
Total 996 12.3 (11.5–13.1) 12.6 (11.8-13.4)
Age group, y
0–4 224 (22) 6.7 40.9 (35.6–46.3)
<2 128 (13) 2.7 58.1 (48.0–68.1)
2–4 96 (10) 4.0 29.4 (23.8–35.9)
5–24 297 (30) 27.4 13.3 (11.8–14.8)
5–17 197 (20) 17.4 13.9 (12.0–15.9)
18-24 100 (10) 10.0 12.3 (9.9–14.7)
25–64 419 (42) 54.0 9.6 (8.6–10.5)
25–49 245 (25) 39.5 7.6 (6.7–8.6)
50–64 174 (17) 14.5 14.8 (12.6–16.9)
>65
56 (6)
14.5
6.0 (4.5–7.7)

Sex§
M 468 (47) 47.4 12.2 (11.1–13.3) 12.5 (11.4–13.7)
F
526 (53)
52.6
12.3 (11.3–13.4)
12.9 (11.9–14.1)
Poverty status§¶
High-poverty area 498 (50) 32.7 18.8 (17.1–20.4) 18.4 (16.8–20.1)
Medium-poverty area 323 (33) 40.9 9.7 (8.7–10.8) 10.1 (9.1–11.3)
Low-poverty area 172 (17) 26.4 8.0 (6.8–9.2) 8.9 (7.6­–10.4)

*CI, confidence interval.
†Percentage of all residents of the city in each category. Estimates based on 2000 US Census data (11). ‡Direct age standardization was performed by using weights based on 2000 US Census data (11). Median age for hospitalized patients was 23 y and for all city residents was 34 y.
§2 persons were missing sex data; 3 persons were missing poverty data.
¶Neighborhood poverty was based on the tertiles of percentage of residents living <200% of the federal poverty level according to the 2000 US Census (11).

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