Table 1 Comparison of demographic and epidemiological characteristics of three types hospitalized influenza-related viral pneumonia patients
Characteristics | B (n = 59) | A (n = 138) | H7N9 (n = 18) | p-value among | |
|---|---|---|---|---|---|
(a) | (b) | (c) | (a) and (b) | (a), (b), and (c) | |
Demographic data | |||||
 Age (y) | |||||
  Median (IQR) | 62 (53–74) | 57 (45.8–66.3) | 60 (43.3–68) | 0.034 | 0.095 |
 Age subgroup (y), no. (%) | |||||
  14–34 | 7 (11.9) | 12 (8.7) | 1 (5.6) | 0.49 | 0.752 |
  35–49 | 6 (10.2) | 33 (23.9) | 4 (22.2) | 0.027 | 0.08 |
  50–64 | 19 (32.2) | 48 (34.8) | 7 (38.9) | 0.726 | 0.863 |
  ≥ 65 | 27 (45.8) | 45 (32.6) | 6 (33.3) | 0.079 | 0.205 |
 Female, no. (%) | 22 (37.3) | 49 (35.5) | 4 (22.2) | 0.812 | 0.486 |
Comorbid conditions, no. (%) | |||||
 Any one condition | 46 (78.0) | 80 (58.0) | 14 (77.8) | 0.007 | 0.013 |
 Chronic pulmonary disease | 7 (11.9) | 20 (14.5) | 2 (11.1) | 0.623 | 0.949 |
 Diabetes | 5 (8.5) | 24 (17.4) | 2 (11.1) | 0.106 | 0.289 |
 Hypertension | 21 (35.6) | 54 (39.1) | 8 (44.4) | 0.64 | 0.778 |
 Chronic renal diseases | 5(8.5) | 7 (5.1) | 2 (11.1) | 0.556 | 0.327 |
 Chronic liver diseases | 7 (11.9) | 15 (10.9) | 5 (27.8) | 0.839 | 0.132 |
 Chronic cardiovascular disease | 5 (8.5) | 25 (18.1) | 2 (11.1) | 0.085 | 0.224 |
 Chronic neurological disease | 4 (6.8) | 5 (3.6) | 1 (5.6) | 0.549 | 0.495 |
 Hematological diseases | 10 (16.9) | 12 (8.7) | 0 (0) | 0.092 | 0.085 |
 Immunosuppression | 7 (11.9) | 11 (8) | 0 (0) | 0.385 | 0.305 |
Pregnancy | 0 (0) | 1 (0.7) | 0 (0) | 1 | 1 |
Current smoker | 9 (15.3) | 36 (26.1) | 7 (38.9) | 0.097 | 0.076 |
Alcohol abuse | 8 (13.6) | 27 (19.6) | 3 (16.7) | 0.312 | 0.633 |
BMI, no. (%) | Â | Â | Â | Â | Â |
 Obesity + morbid obesity | 0 (0) | 7 (5.1) | 0 (0) | 0.105 | 0.229 |
Exposure to live poultry in previous 14Â days, no. (%) | NA | NA | 12 (66.7) | Â | Â |