Table 1.
Characteristics of the studied populations
| All subjects (n = 248) | Healthy subjects (n = 73) | Skin prick test positive (n = 32) | Skin prick test negative (n = 41) | ||
|---|---|---|---|---|---|
| Gender | Male/Female | 106/142 | 27/46 | 11/21 | 16/25 |
| Atopy | Atopics/Nonatopics | 116/132 | 32/41 | 32/0 | 0/41 |
| Smoking history | Non-/Ex-/Current smokers | 121/38/89 | 73/0/0 | 32/0/0 | 41/0/0 |
| Age (years) | Mean (range) | 45 (26–61) | 44 (27–61) | 43 (27–61) | 45 (28–61) |
| Height (cm) | Mean (range) | 170.5 (146–198) | 170.8 (155–189) | 170.3 (156–189) | 171.3 (155–188) |
| Weight (kg) | Mean (range) | 74.5 (45–139) | 71.8 (45–111) | 70.7 (45–96) | 72.6 (56–111) |
| Body mass index | Mean (range) | 25.5 (17.1–53.3) | 24.5 (18.5–38.9) | 24.3 (18.5–34.0) | 24.7 (19.3–38.9) |
| FVC (L) | Mean (range) | 4.4 (2.2–7.5) | 4.4 (2.7–6.3) | 4.4 (2.7–6.3) | 4.4 (3.0–6.2) |
| FVC, % of predicted* | Mean (range) | 98.1 (67–145) | 99.4 (72–145) | 99.4 (72–125) | 99.3 (76–145) |
| FEV1 (L) | Mean (range) | 3.4 (1.0–5.6) | 3.5 (2.4–5.4) | 3.5 (2.4–5.0) | 3.5 (2.4–5.4) |
| FEV1, % of predicted* | Mean (range) | 93.0 (41–129) | 97.3 (72–129) | 96.9 (75–127) | 97.6 (72–129) |
| FEV1/FVC, % of predicted* | Mean (range) | 94.9 (55–115) | 98.2 (88–115) | 97.7 (88–109) | 98.5 (90–115) |
*
Finnish reference values (15).
FVC, forced vital capacity; FEV1, forced expiratory volume in 1 s.