Volume 20, Number 1—January 2014
Research
Population-based Surveillance for Bacterial Meningitis in China, September 2006–December 2009
Table 3
Demographic information for AMES case-patients meeting the World Health Organization definition for probable bacterial meningitis, China, September 2006–December 2009*
Demographic variable | % PMB case-patients (no. with CSF specimen/no. total), by province/prefecture |
% total PBM case-patients (no. with CSF specimen/no. total), n = 3,464 | |||
---|---|---|---|---|---|
Shandong/Jinan, n = 1,007 | Hubei/Yichang, n = 751 | Hebei/Shijiazhuang, n = 575 | Guangxi/Guigang, n = 1,131 | ||
Total PBM patients |
28.6 (288/1,007) |
15.8 (119/751) |
31.0 (178/575) |
21.9 (248/1,131) |
24.0 (833/3,464) |
Case-patient age, y | |||||
<2 | 28.9 (39/135) | 26.8 (11/41) | 47.0 (95/202) | 22.0 (54/246) | 31.9 (199/624) |
2–4 | 29.5 (62/210) | 16.7 (8/48) | 25.0 (23/92) | 24.7 (47/190) | 25.9 (140/540) |
5–14 | 30.6 (102/333) | 16.1 (25/155) | 20.9 (37/177) | 20.8 (57/274) | 23.5 (221/939) |
15–29 | 23.3 (31/133) | 14.1 (22/156) | 28.1 (16/57) | 20.4 (21/103) | 20.0 (90/449) |
30–44 | 28.4 (29/102) | 17.1 (28/164) | 19.0 (4/21) | 24.7 (21/85) | 22.0 (82/372) |
>45 |
26.6 (25/94) |
13.4 (25/187) |
11.5 (3/26) |
20.6 (48/233) |
18.7 (101/540) |
Case-patient sex | |||||
M | 30.3 (191/630) | 17.1 (79/463) | 30.7 (107/349) | 20.9 (147/705) | 24.4 (524/2,147) |
F |
25.7 (97/377) |
13.9 (40/288) |
31.4 (71/226) |
23.7 (101/426) |
23.5 (309/1,317) |
Case-patient place of residence | |||||
Residents | 31.9 (166/521) | 15.4 (106/687) | 25.7 (45/175) | 21.6 (241/1,116) | 22.3 (558/2,499) |
Non-residents |
25.1 (122/486) |
20.3 (13/64) |
33.3 (133/400) |
46.7 (7/15) |
28.5 (275/965) |
Yearly PBM incidence/100,000 population | |||||
All residents | |||||
Crude rate | 0.82 | 0.81 | 0.33 | 2.20 | |
Adjusted rate* | 2.61 | 1.84 | 2.26 | 2.93 | |
Residents <5 y old | |||||
Crude rate | 4.16 | 2.16 | 3.22 | 14.21 | |
Adjusted rate† | 8.41 | 6.95 | 14.47 | 22.30 |
*AMES, acute meningitis and encephalitis syndrome; PBM, probable bacterial meningitis.
†Adjusted rate was calculated based on PBM positivity among resident case-patients by age and initial clinical diagnosis applied to all cases without cerebrospinal fluid specimen and profile. Two assumptions were made when adjusting the rate: (1) the subset tested is a representative specimen of AMES cases, and (2) there was a homogenous rate of infection within a given prefecture, age group, and initial clinical diagnosis stratum.
1These authors contributed equally to this article.
2Members of the Acute Meningitis and Encephalitis Syndrome Study Group are listed at the end of this article.