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A minor error was found in Table 1 that described and compared the demographics amongst all participants, cases, controls and mono-infections after publishing this work [1]. For recruits, the number and the corresponding proportion in each group was under-reported. This was caused by discrepancies in the database in how recruits were coded that were not noticed until now. We have recoded recruits in the database and have re-analysed data. The differences in proportions of recruits amongst all groups remained significant with the revised data (Table 1). These errors only affect this table. All the other results and conclusions remain.
Table 1.
Demographics of all participants, cases, controls and mono-infection cases
| Characteristics | All (Count,%) | Cases (Count,%) | Controls (Count,%) | Mono-infection (Count,%) | p-value† |
|---|---|---|---|---|---|
| Age (Mean, SD) | 20.8 (3.1) | 20.7 (3.1) | 21.1 (2.9) | 20.7 (3.2) | 0.781 |
| Male | 9055 (99.8) | 7713 (99.7) | 1342 (99.9) | 3422 (99.8) | 0.902 |
| Current Smoker | 2475 (27.3) | 2090 (27.0) | 385 (28.6) | 887(25.9) | 0.220 |
| Recruit | 6048 (66.6) | 5568 (72.0) | 480 (35.7) | 2495 (72.7) | <0.001 |
| Asthma | 1833 (20.2) | 1597 (20.7) | 236 (17.6) | 721 (21.0) | 0.051 |
| Heart Disease | 102 (1.1) | 83 (1.1) | 19 (1.4) | 37 (1.1) | 0.748 |
| Total | 9077 (100.0) | 7733 (100.0) | 1344 (100.0) | 3430 (100.0) | - |
† By ANOVA test, comparing mean age, and by Pearson’s chi-square test, comparing proportions across all categories.
We apologise for this oversight, and the inconvenience that we might have brought.
Footnotes
The online version of the original article can be found at 10.1186/1471-2334-14-204
Xin Quan Tan, Xiahong Zhao contributed equally to this work.
Contributor Information
Xin Quan Tan, Email: tanxq1986@gmail.com.
Xiahong Zhao, Email: xiahong_zhao@nuhs.edu.sg.
Vernon J Lee, Email: vernonljm@hotmail.com.
Jin Phang Loh, Email: jimmyloh@dso.org.sg.
Boon Huan Tan, Email: Tantboonhua@dso.org.sg.
Wee Hong Victor Koh, Email: kweehong@dso.org.sg.
Sock Hoon Ng, Email: Ngng_sock_hoon@dso.org.sg.
Mark I-Cheng Chen, Email: mark.chen.ic@gmail.com.
Alex Richard Cook, Email: Cookalex.richard.cook@gmail.com.
References
- 1.Tan XQ, Zhao X, Lee VJ, Loh JP, Tan BH, Koh WH, Ng SH, Chen MI, Cook AR. Respiratory viral pathogens among Singapore military servicemen 2009–2012: epidemiology and clinical characteristics. BMC Infect Dis. 2014;14(1):204. doi: 10.1186/1471-2334-14-204. [DOI] [PMC free article] [PubMed] [Google Scholar]
Pre-publication history
- The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2334/14/326/prepub