Table 3.
First author, y | Setting | Age group or range | Fevera | Coughb | Rhinitisc | Sore throat | Headache | Dyspnoead | GI symptomse | Myalgia | Age‐adjusted |
---|---|---|---|---|---|---|---|---|---|---|---|
A vs. B | |||||||||||
Hite, 2007 40 | Hosp | <19 | ns & nr | ns & nr | ns & nr | ns & nr | ns & nr | ns & nr | ns & nr | 0.34 (0.13‐0.91) | Unclear |
A(H1N1)p vs. B | |||||||||||
Yap, 2012 43 | Non‐hosp | Young adults | 0.51 (0.29‐0.92) | 2.1 (1.25‐3.54) | 0.54 (0.34‐0.86) | 0.44 (0.24‐0.80) | ns & nr | ‐ | ‐ | ns & nr | Yes |
Gutiérrez‐Pizarraya, 2012 41 | Non‐hosp | Adults | 2.5 (1.2‐5.4) | ‐ | ‐ | ‐ | ‐ | ‐ | ns & nr | ‐ | Unclear |
A(H3N2) vs. B | |||||||||||
Yap, 2012 43 | Non‐hosp | Young adults | ns & nr | ns & nr | ns & nr | ns & nr | ns & nr | ‐ | ‐ | ns & nr | Yes |
Cohen, 2014 30 | Hosp | All ages | ns & nr | ns & nr | ‐ | ‐ | ‐ | ns & nr | ‐ | ‐ | Yes |
A(H1N1)p vs. A(H3N2) | |||||||||||
Yap, 2012 43 | Non‐hosp | Young adults | 0.33 (0.11‐0.99) | ns & nr | ns & nr | ns & nr | ns & nr | ‐ | ‐ | ns & nr | Yes |
Cohen, 2014 30 | Non‐hosp | All ages | ns & nr | ns & nr | ‐ | ‐ | ‐ | ns & nr | ‐ | ‐ | Yes |
Dangi, 2014 10 | Non‐hosp | All ages | ‐ | ‐ | ‐ | 2.27 (1.22‐4.22) | ns & nr | ns & nr | ns & nr | ns & nr | Unclear |
B Victoria vs. B Yamagata | |||||||||||
Dangi, 2014 10 | Non‐hosp | All ages | ‐ | ‐ | ‐ | ns & nr | ns & nr | 12.0 (2.4‐59.8) | 9.6 (1.0‐19.4) | ns & nr | Unclear |
Sočan, 2014 31 | Non‐hosp | All ages | 1.6 (0.5‐5.1) | 1.1 (0.4‐3.0) | 0.6 (0.3‐1.1) | 1.1 (0.6‐1.9) | 0.7 (0.3‐1.4) | ‐ | 1.1 (0.5‐2.3) | 1.5 (0.9‐2.7) | Yes |
Hosp | 0.7 (0.3‐1.6) | 0.7 (0.3‐1.8) | ‐ | ‐ | ‐ | 0.9 (0.3‐1.8) | ‐ | ‐ | Yes |
Ns, not statistically significant; nr, not reported; Hosp, hospital‐based studies, that is, in which all included patients were hospitalized. Non‐hosp, studies that included both hospitalized and non‐hospitalized patients.
Fever, high fever.
Cough (not specified), dry cough.
Rhinitis, rhinorrhea, coryza, running nose.
Dyspnoea, wheezing, shortness of breath.
Gastrointestinal (GI) symptoms not specified, vomiting, diarrhea.
Bold value indicates the significant findings (p < .05).