Table 1. Characteristics of participants with post-bronchodilator spirometry in the two analysed samples.
| 2003 Mexico City PLATINO subsample (n=542) | 2010 Mexico City survey sample (n=659) | |
|---|---|---|
| Demographics | ||
| Age group (%) | ||
| 40–49 | 41.5 | 29.7 |
| 50–59 | 24.7 | 34.6 |
| 60–69 | 18.1 | 22.5 |
| 70–79 | 9.4 | 9.4 |
| ⩾80 | 6.3 | 3.8 |
| % Men | 43.9 | 41.1 |
|
Anthropometry, mean (s.d.)
| ||
| Height (cm) | 156.3 (9.5)) | 156.6 (9.1) |
| Weight (kg) | 69.5 (13.6) | 71.6 (13.9) |
| Body mass index (kg/m2) | 28.4 (4.9) | 29.2 (5.1) |
| % Obese | 29.5 | 37.0 |
|
Respiratory symptoms, %
| ||
| Cough and phlegm on most days for at least 3 months per year | 4.2 | 4.4 |
| Attack of wheezing with shortness of breath in the past 12 months | 3.3 | 2.4 |
|
Medical diagnosis, %
| ||
| Asthma | 5.0 | 4.9 |
| COPD | 2.4 | 0.8 |
| Tuberculosis | 0.7 | 0.9 |
|
Exposures
| ||
| Pack-years of cigarette smoking, % | ||
| Never smoker | 57.2 | 56.2 |
| 1–9 | 28.0 | 28.7 |
| ⩾10 | 14.8 | 15.2 |
| % who worked in a dusty job for >1 year | 46.7 | 38.5 |
| Years exposed to wood smoke from cooking, mean (s.d.) | 5.5 (9.8) | 5.2 (9.0) |
|
COPD prevalence, % (n) | ||
| GOLD stages 1–4 | 9.0 (49) | 3.6 (24) |
| GOLD stages 2–4 | 3.5 (19) | 1.8 (12) |
| FEV1/FEV6 <LLN | 4.1 (22) | 2.6 (17) |
Abbreviations: COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FEV6, forced expiratory volume in 6 s; GOLD, Global Initiative for Chronic Obstructive Lung Disease; LLN, lower limit of normal.