Table 2.
Demographic and clinical characteristics of the subjects who fulfilled COPD criterion (postbronchodilator FEV1/FVC ratio <0.70) at baseline
| Variables | São Paulo (n=152)
|
Montevideo (n=174)
|
Santiago (n=198)
|
Total sample (n=524)
|
|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | |
| Sex (male, %) | 77 (50.7) | 98 (56.3) | 106 (53.5) | 281 (53.6) |
| Age (years) | ||||
| 40–49 | 32 (21.1) | 12 (6.9) | 28 (14.1) | 72 (13.7) |
| 50–59 | 50 (32.9) | 30 (17.2) | 49 (24.8) | 129 (24.6) |
| ≥60 | 70 (46.0) | 132 (75.9) | 121 (61.1) | 323 (61.6) |
| Skin color | ||||
| White | 90 (59.2) | 161 (92.5) | 144 (72.7) | 395 (75.4) |
| Mulatto/black | 52 (34.2) | 8 (4.6) | 41 (20.7) | 101 (19.3) |
| Others | 10 (6.6) | 5 (2.9) | 13 (6.6) | 28 (5.3) |
| Schooling (completed years of formal education) | ||||
| 0–2 | 49 (32.2) | 15 (8.6) | 26 (13.1) | 90 (17.2) |
| 3–4 | 48 (31.6) | 32 (18.4) | 25 (12.6) | 105 (20.0) |
| 5–8 | 32 (21.1) | 74 (42.5) | 62 (31.3) | 168 (32.1) |
| ≥9 | 23 (15.1) | 53 (30.5) | 85 (42.9) | 161 (30.7) |
| BMI (kg/m2)* | ||||
| <25.0 | 70 (46.1) | 61 (35.1) | 61 (31.0) | 192 (36.7) |
| 25.0–29.9 | 50 (32.9) | 68 (39.1) | 82 (41.6) | 200 (38.2) |
| ≥30 | 32 (21.0) | 45 (25.8) | 54 (27.4) | 131 (25.1) |
| Smoking (pack-years*) | ||||
| <10 | 78 (51.3) | 74 (42.5) | 110 (55.8) | 262 (50.1) |
| 10–20 | 19 (12.5) | 15 (8.6) | 30 (15.2) | 64 (12.2) |
| >20 | 55 (36.2) | 85 (48.9) | 57 (28.9) | 197 (37.7) |
| mMRC dyspnea scale score* | ||||
| 0 | 88 (57.9) | 80 (46.5) | 86 (45.0) | 254 (49.3) |
| 1 | 25 (16.5) | 47 (27.3) | 38 (19.9) | 110 (21.4) |
| 2 | 19 (12.5) | 20 (11.6) | 31 (16.2) | 70 (13.6) |
| 3 | 16 (10.5) | 23 (13.4) | 35 (18.3) | 74 (14.4) |
| 4 | 4 (2.6) | 2 (1.2) | 1 (0.5) | 7 (1.4) |
| Cough (yes, %) | 52 (34.2) | 61 (25.1) | 67 (33.8) | 180 (34.3) |
| Phlegm (yes, %) | 41 (27.0) | 46 (26.4) | 58 (29.3) | 145 (27.7) |
| Wheezing (in the last 12 months; yes, %) | 59 (38.8) | 70 (40.2) | 98 (49.5) | 227 (43.3) |
| Any respiratory medicine use (in the last 12 months; yes, %) | 28 (18.4) | 37 (21.3) | 71 (35.9) | 136 (25.9) |
| Medical diagnosis of COPD (yes, %) | 19 (12.5) | 13 (7.5) | 25 (12.6) | 57 (10.9) |
Note:
*
Variables with missing values (smoking and BMI with one missing value and mMRC scale with nine missing values).
Abbreviations: BMI, body mass index; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; mMRC, modified Medical Research Council.