Table 3 Frequency of FEV1/FVC < LLN by age and sex in Caucasian and Iranian equation
From: Normal spirometry prediction equations for the Iranian population
Age groups | Total (622) | Males (204) | Females (418) | ||||||
|---|---|---|---|---|---|---|---|---|---|
n | Caucasian | Iranian | n | Caucasian | Iranian | n | Caucasian | Iranian | |
< 10 | 33 | 14 (42.4) | 0 | 13 | 6 (46.2) | 0 | 20 | 8 (40.0) | 0 |
10–21 | 53 | 4 (7.5) | 2 (3.78) | 38 | 2 (5.3%) | 1 (2.63) | 15 | 2 (13.3) | 1 (6.7) |
22–29 | 44 | 2 (4.5) | 0 | 21 | 0 | 0 | 23 | 2 (8.7) | 0 |
30–39 | 127 | 1 (0.8) | 1 (0.8) | 43 | 0 | 0 | 84 | 1 (1.2) | `1 (1.2) |
40–49 | 124 | 1 (0.8) | 1 (0.8) | 25 | 0 | 0 | 99 | 1 (1.0) | 1 (1.0) |
50–59 | 135 | 3 (2.2) | 2 (1.15) | 29 | 1 (3.4) | 1 (3.4) | 106 | 2 (1.9) | 1 (0.94) |
60–69 | 82 | 0 | 3 (3.66) | 19 | 0 | 0 | 63 | 0 | 3 (4.8) |
70–84 | 24 | 4 (16.7) | 2 (8.3) | 16 | 4 (25.0) | 2 (12.5) | 8 | 0 | 0 |