Research Article
An Increased Frequency in HLA Class I Alleles and Haplotypes Suggests Genetic Susceptibility to Influenza A (H1N1) 2009 Pandemic: A Case-Control Study
Table 1
Characteristics of influenza A H1N1/09 patients (INF-P) and contacts (INF-C) recruited during April to December 2009.
| | INF-P () | INF-C () | |
| Age | 43.26 ± 13.86 | 42.21 ± 12.03 | | Gender [male (%)/female (%)] | 78 (56.52)/60 (43.48) | 105 (46.67)/120 (53.33) | | Weight (kg) | 83.41 ± 20.45 | 71.00 ± 14.10 | <0.01 | Height (m) | 1.64 ± 0.10 | 1.59 ± 0.09 | <0.01 | BMI | 30.88 ± 6.92 | 27.85 ± 4.86 | 0.01 | Smoking (Y/N, %) | 45.65/54.35 | 30.61/69.39 | 0.02 | Comorbidities (%) | Neurological disease | 25 (18.11) | 33 (14.66) | | Asthma | 2 (1.44) | 6 (2.66) | | Cancer | 1 (0.72) | 0 (0.00) | | Hypertension | 8 (5.79) | 17 (7.55) | | Symptomatology (%) | Fever (>38°C) | 104 (75.36) | 0 (0.00) | | Cough | 72 (52.17) | 0 (0.00) | | Nasal congestion | 17 (12.31) | 0 (0.00) | | Rhinorrhea | 39 (28.26) | 0 (0.00) | | Dyspnea | 101 (73.18) | 0 (0.00) | | Region of origin; (%) | Central Mexico | 106 (76.81) | 155 (68.89) | | North Mexico | 18 (13.04) | 45 (20.00) | | Southeast Mexico | 14 (10.14) | 25 (11.11) | |
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INF-P: influenza patients; INF-C: influenza contacts; : number of subjects; BMI: body mass index. value < 0.05 is considered significant. |