Table 1.
Demographic and clinical characteristics of patients aged ≥16 years (all adults group)
| Cases N = 528 |
Controls N = 835 |
p-value | |
|---|---|---|---|
| Age, years | |||
| Mean (SD) | 67.11 (20.05) | 69.17 (16.94) | 0.732 |
| Median (range) | 70 (18–104) | 73 (18–99) | |
| Age subgroups, n (%) | |||
| 16–49 years | 107 (20.3) | 107 (12.8) | 0.118 |
| 50–64 | 101 (19.1) | 164 (19.6) | |
| 65–75 years | 101 (31.6) | 206 (36.5) | |
| > 75 years | 219 (68.4) | 358 (63.5) | |
| Female, n (%) | 288 (54.5) | 469 (56.2) | 0.580 |
| BMI, kg/m2 | |||
| Mean (SD) | 26.51 (6.74) | 26.81 (7.07) | 0.407 |
| Median (range) | 25.39 (9.64–60.35) | 25.73 (10.7–63.77) | |
| Obese (BMI ≥30 kg/m2), n (%) | 103 (19.5) | 229 (27.4) | 0.016 |
| ≥1 co-morbidity, n (%) | |||
| Cardiac disease | 210 (39.8) | 415 (49.7) | 0.005 |
| Vascular disease | 317 (60.0) | 557 (66.7) | 0.093 |
| Pulmonary disease | 231 (43.8) | 426 (51.0) | 0.021 |
| Smoking, n (%) | |||
| Current | 89 (16.9) | 143 (17.1) | 0.529 |
| Past | 143 (27.1) | 334 (40.0) | <0.001 |
| Children aged <5 years in household, n (%) | |||
| 0 | 456 (86.3) | 763 (91.4) | 0.001 |
| 1 or more | 54 (10.2) | 46 (5.5) | |
| Received 2011/12 seasonal influenza vaccine, n (%) | 262 (49.6) | 529 (63.4) | <0.001 |
| Received 2010/11 seasonal influenza vaccine, n (%) | 248 (47.0) | 515 (61.7) | <0.001 |
N number of patients, BMI body mass index, SD standard deviation
Missing data: BMI: 40 cases (7.6%), 15 controls (1.8%); Obesity: 40 cases (7.6%), 15 controls (1.8%); Current smoking: 5 cases (0.9%), 7 controls (0.8%); Past smoking: 105 cases (19.9%), 156 controls (18.7%); Children aged <5 years in the household: 18 cases (3.4%), 26 controls (3.1%); Received 2010/11 seasonal influenza vaccine: 47 cases (8.9%), 42 controls (5.0%)