Table 5.
Forced vital capacity (FVC) and FVC% and the ratio FEV1to FVC (FEV1/FVC%) in healthy active workers
| |
Males |
Females |
||
|---|---|---|---|---|
| Age (years) | Nonsmokers(n=78 306) | Smokers(n=85 153) | Nonsmokers(n=27 883) | Smokers(n=31 499) |
|
16–24 | ||||
|
FEV1/FVC% |
86.9(86.7–87.2)* |
86.2 (86.0–86.4) |
88.0 (87.6–88.5)* |
86.9 (86.7–87.3) |
|
FVC (l) |
4.907 (4.885–4.930) |
4.920 (4.902–4.937) |
3.520 (3.481–3.538) |
3.560 (3.539–3.581) |
|
FVC% |
96.0 (95.6–96.4)* |
96.9 (96.6–97.3) |
93.4 (92.7–94.0) |
94.8 (94.3–95.3) |
|
25–34 | ||||
|
FEV1/FVC% |
86.0 (85.9–86.1)* |
85.3 (85.2–85.4) |
87.2 (87.1–87.4)* |
86.4 (86.3–86.6) |
|
FVC (l) |
4.873 (4.864–4.884) |
4.875 (4.865–4.883) |
3.540 (3.527–3.553) |
3.563 (3.553–3.573) |
|
FVC% |
97.4 (97.7–98.0) |
97.7 (97.6–97.9) |
98.1 (97.8–98.4 |
98.3 (98.0–98.5) |
|
35–44 | ||||
|
FEV1/FVC% |
85.6 (85.5–85.7)* |
84.5 (84.4–84.6) |
86.3 (86.1–86.5)* |
85.1 (84.9–85.2) |
|
FVC (l) |
4.623 (4.613–4.633) |
4.556 (4.547–4.565) |
3.399 (3.386–3.412) |
3.378 (3.367–3.389) |
|
FVC% |
98.8 (98.7–99.0)* |
97.4 (97.2–97.6) |
102.2 (101.8–102.5) |
101.4 (101.1–101.7) |
|
45–54 | ||||
|
FEV1/FVC% |
85.3 (85.2–85.4)* |
83.2 (83.1–83.3) |
85.9 (85.8–86.1)* |
83.9 (83.7–84.1) |
|
FVC( l) |
4.224 (4.214–4.233) |
4.088 (4.077–4.099) |
3.075 (3.063–3.087) |
3.036 (3.022–3.049) |
|
FVC% |
97.7 (97.5–97.9)* |
94.9 (94.7–95.1) |
102.8 (102.5–103.2)* |
100.2 (99.7–100.6) |
|
55–64 | ||||
|
FEV1/FVC% |
84.2 (84.1–84.4)* |
81.6 (81.3–81.8) |
85.5 (85.2–85.8)* |
83.7 (83.2–84.2) |
|
FVC (l) |
3.746 (3.733–3.759) |
3.588 (3.570–3.605) |
2.710 (2.692–2.729) |
2.654 (2.623–2.685) |
|
FVC% |
95.6 (95.3–95.9)* |
91.6 (91.2–92.0) |
101.8 (101.2–102.5)* |
98.9 (97.8–100.0) |
|
>64 | ||||
|
FEV1/FVC% |
83.4 (82.5–84.3)* |
80.2 (78.3–82.2) |
85.8 (84.0–87.6) |
79.4 (71.8–86.9) |
|
FVC (l) |
3.230 (3.112–3.350) |
3.480 (3.405–3.554) |
2.396 (2.293–2.499) |
2.350 (1.955–2.744) |
| FVC% | 88.9 (85.6–92.2) | 92.9 (91.2–94.6) | 101.2 (97.2–105.1) | 86.7 (79.9–93.6) |
Values are means and 95% confidence intervals.
* Statistically significant differences between smokers and nonsmokers for males and females (t test for independent groups, with P < 0.001).
FVC(l):Forced vital capacity in liters.
FVC(%):Forced vital capacity expressed as a percentage respect to normal values..
FEV1: Forced volume in 1 second in liters.
FEV1/FVC%: The ratio of FEV1to FVC expressed as a percentage.