Mexico / Humans / Mexico City / Female / Male / Mexican American / Mexican Americans / Aged / Middle Aged / Spirometry / Adult / Vital Capacity / Public health systems and services research / MEXICO / Reference Values / Healthy Subjects / Reference Value / Predictive value of tests / Expected Value / Mexican American / Mexican Americans / Aged / Middle Aged / Spirometry / Adult / Vital Capacity / Public health systems and services research / MEXICO / Reference Values / Healthy Subjects / Reference Value / Predictive value of tests / Expected Value