Volume 17, Number 2—February 2011
Dispatch
Pandemic (H1N1) 2009–associated Pneumonia in Children, Japan
Maki Hasegawa, Takafumi Okada, Hiroshi Sakata, Eiichi Nakayama, Tatsuo Fuchigami, Yasuji Inamo, Hideo Mugishima, Takeshi Tajima, Satoshi Iwata, Miyuki Morozumi, Kimiko Ubukata, Haruo Watanabe, and Takashi Takahashi
Table 2
Laboratory test results for children hospitalized with pandemic (H1N1) 2009–associated pneumonia, Japan, August–November 2009*
| Characteristic | Group A, no complications, n = 63 |
Group B, complications, n = 17 |
||
|---|---|---|---|---|
| Age <5 y, n = 15 | Age >6 y, n = 48 | Age >6 y, n = 14 | ||
| Leukocytes, cells/μL (range)† | 6,400 (3,600–14,400) | 7,400 (2,400–17,100) | 14,200 (5,100–22,700) | |
| Neutrophils‡ | 4,929 (2,227–8,256) | 6,081(1,248–15,287) | 12,849 (4,182–22,042) | |
| Lymphocytes§ | 1,593 (74–7,638) | 608 (214–2,064) | 560 (295–1,889) | |
| Eosinophils | 0 (0–102) | 16 (0–918) | 23 (0–145) | |
| Monocytes |
240 (37–1,685) |
359 (99–1,271) |
337 (0–714) |
|
| CRP, mg/dL (range)¶ | 1.0 (0.1–2.9) | 2.4 (0.05–11.95) | 3.5 (1–7.83) | |
| LDH, IU/L (range)¶ | 304 (230–415) | 248 (182–575) | 248 (193–353) | |
| CK, IU/L (range)¶ | 101 (40–328) | 110 (29–2,240) | 148 (57–1,524) | |
| IgE, IU/mL (range)# | 61 (7.3–311) | 443 (34–4,680) | 1,058 (43–4,011) | |
*CRP, C-reactive protein; LDH, lactate dehydrogenase; CK, creatine kinase; Ig, immunoglobulin.
†Reference ranges by age group: <1 y, 7,000–15,000; 2–5 y, 7,000–11,000; >6 y, 6,500–10,000.
‡Reference range by age group: <1 y, 4,000–8,000; 2–5 y, 2,500–5,500; >6 y, 3,000–5,000.
§Reference range by age group: <1 y, 4,000–11,000; 2–5 y, 3,000–7,000; >6 y, 2,500–4,500.
¶Reference upper limits for CRP, LDH, and CK levels are 0.3, 400, and 200, respectively.
#Reference ranges for IgE by age group: 1–3 y, <30; 4–6 y, <110; >7 y, <170. Serum IgE data were analyzed when available.
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