Table 1.
Demographic and clinical characteristics of bronchiectasis patients.
| Mean ± SD/N (%) | Overall (n = 2099) | Men (n = 974) | Women (n = 1125) | p value |
|---|---|---|---|---|
| Age | 61.0 ± 20.6 | 60.9 ± 21.8 | 61.0 ± 19.6 | 0.88 |
| Smoking | <0.001 | |||
| Smoker | 206 (9.8) | 137 (14.1) | 69 (6.1) | |
| Former smoker | 512 (24.4) | 391 (40.2) | 121 (10.8) | |
| Non-smoker | 1378 (65.7) | 445 (45.7) | 933 (83.1) | |
| BMI | 24.3 ± 4.9 | 24.6 ± 4.5 | 24.1 ± 5.1 | 0.010 |
| FVC (%) | 70.0 ± 19.8 | 66.5 ± 19.7 | 73.1 ± 19.4 | <0.001 |
| FEV1 (%) | 64.8 ± 24.5 | 58.3 ± 24.5 | 70.5 ± 23.1 | <0.001 |
| FEV1/FVC | 68.6 ± 15.2 | 64.3 ± 16.1 | 72.5 ± 13.2 | <0.001 |
| SaO2 | 94.8 ± 4.0 | 94.2 ± 4.3 | 95.3 ± 3.5) | <0.001 |
| Bronchodilator test | 0.23 | |||
| Negative | 907 (46.0) | 426 (47.2) | 481 (45.0) | |
| Positive | 522 (26.5) | 222 (24.6) | 300 (28.0) | |
| Not performed | 543 (27.5) | 254 (28.2) | 289 (27.0) | |
| Diagnostic test for bronchiectasis | 0.20 | |||
| HRCT | 1716 (81.9) | 803 (82.4) | 913 (81.4) | |
| CT | 304 (14.5) | 129 (13.2) | 175 (15.6) | |
| Bronchography | 14 (0.7) | 7 (0.7) | 7 (0.6) | |
| Chest X-ray and clinical presentation | 62 (3.0) | 35 (3.6) | 27 (2.4) | |
| Location of bronchiectasis | 0.31 | |||
| Localized | 527 (25.2) | 258 (26.5) | 269 (24.0) | |
| Bilateral | 946 (45.2) | 424 (43.6) | 522 (46.5) | |
| Diffuse | 622 (29.7) | 291 (29.9) | 331 (29.5) | |
| Expectoration | 0.04 | |||
| No | 299 (14.2) | 119 (12.2) | 180 (16.0) | |
| Frequently | 631 (30.1) | 292 (30.0) | 339 (30.1) | |
| Daily | 1169 (55.7) | 563 (57.8) | 606 (53.9) | |
| Type of expectoration | 0.02 | |||
| White | 611 (29.1) | 298 (30.6) | 313 (27.8) | |
| White-yellow | 701 (33.4) | 315 (32.3) | 386 (34.3) | |
| Yellow-green | 489 (23.3) | 243 (24.9) | 246 (21.9) | |
| No | 298 (14.2) | 118 (12.1) | 180 (16.0) | |
| Haemoptysis | 0.69 | |||
| No | 1393 (66.4) | 656 (67.4) | 737 (65.6) | |
| Occasionally | 618 (29.5) | 280 (28.7) | 338 (30.1) | |
| Frequently | 86 (4.1) | 38 (3.9) | 48 (4.3) | |
| Sinusitis | 0.12 | |||
| n (%) | 624 (29.7) | 273 (28) | 351 (31.2) | |
| Chronic bronchial colonization | 0.01 | |||
| Occasional | 51 (3.7) | 20 (3.2) | 31 (4.1) | |
| Yes | 807 (59.2) | 393 (63.8) | 414 (55.3) | |
| No | 247 (18.1) | 106 (17.2) | 141 (18.9) | |
| No expectoration | 259 (19.0) | 97 (15.7) | 162 (21.7) | |
| CBC Hi | <0.01 | |||
| n (%) | 234 (17.2) | 132 (21.4) | 102 (13.6) | |
| CBC Pa | 0.94 | |||
| n (%) | 500 (36.7) | 227 (36.9) | 273 (36.5) | |
| Deaths | <0.001 | |||
| n (%) | 258 (14.1) | 157 (18.6) | 101 (10.2) |
SD: standard deviation; BMI: body mass index; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; SaO2: oxygen saturation; HRCT: high-resolution computed tomography; CBC: chronic bronchial colonization; Hi: Haemophilus influenzae; Pa: Pseudomonas aeruginosa.