Table 4

Odds ratios (95% confidence intervals) for respiratory symptoms, hay fever and eczema, determined by multiple regression analysis. Significant relations are printed in bold. Birth weight, gestational age, duration of mechanical ventilation and smoking habits are entered as categorical covariates.


dyspnea
 asthma
 wheeze
 SOBDE*
 hayfever
 eczema
birth weight (gram)
 500–1000
 0.4 (0.2–1.1)
 0.6 (0.2–2.4)
 1.6 (0.7–4.0)
 0.6 (0.2–1.9)
 1.2 (0.3–4.4)
 1.2 (0.3–4.5)

1000–1500
 0.5 (0.3–1.2)
 0.8 (0.3–2.0)
 1.7 (0.8–3.6)
 1.0 (0.4–2.3)
 1.4 (0.5–3.6)
 1.5 (0.6–4.3)
Gestational age (weeks)
 till 28
 0.4 (0.2–0.9) †
 0.8 (0.2–2.6)
 0.9 (0.4–1.9)
 1.1 (0.5–2.7)
 1.3 (0.4–4.2)
 0.9 (0.3–2.7)

28–31
 0.5 (0.2–0.9) †
 1.1 (0.4–2.6)
 1.0 (0.6–1.9)
 0.7 (0.3–1.4)
 1.2 (0.5–2.9)
 0.9 (0.4–2.3)
Mechanical ventilation (days)
 1–7 days
 1.1 (0.6–216)
 1.3 (0.6–3.1)
 1.0 (0.5–1.9)
 1.1 (0.5–2.2)
 1.4 (0.6–3.2)
 1.21 (0.5–2.8)

8–28 days
 0.9 (0.4–2.2)
 0.3 (0.1–1.5)
 1.2 (0.6–2.6)
 0.7 (0.3–1.9)
 0.7 (0.2–2.3)
 1.1 (0.4–3.4)

>28
 5.2 (1.2–23.3) †
 0.3 (0.0–4.0)
 1.6 (0.4–6.9)
 0.2 (0.2–2.7)
 0.7 (0.1–7.7)
 0.4 (0.0–3.7)
female gender
1.6 (1.0–2.7)
 1.2 (0.6–2.3)
 2.0 (1.2–3.2) †
 3.8 (2.0–7.3) ‡
 0.7 (0.1–7.7)
 1.3 (0.7–2.5)
Maternal smoking
1.1 (0.6–1.9)
 1.6 (0.7–3.5)
 1.6 (1.0–2.8)
 1.3 (0.7–2.5)
 0.6 (0.3–1.3)
 1.0 (0.5–2.1)
Maternal asthma
2.5 (1.2–5.4) †
 4.2 (1.8–10.5) ‡
 1.3 (0.6–2.9)
 1.6 (0.6–4.1)
 1.8 (0.6–5.2)
 2.0 (0.7–5.3)
BPD
3.1 (1.2–8.2) †
 3.1 (0.7–14.6)
 1.5 (0.6–3.6)
 2.0 (0.6–6.9)
 0.4 (0.1–2.3)
 2.4 (0.8–7.4)
Smoking participant
 past
 1.2 (0.6–2.5)
 0.6 (0.2–1.7)
 0.9 (0.4–1.9)
 2.2 (1.0–4.8) †
 1.5 (0.6–3.6)
 1.4 (0.6–3.4)

"party"
 0.5 (0.1–1.5)
 0.9 (0.3–2.9)
 1.9 (0.8–4.0)
 0.9 (0.3–2.5)
 0.3 (0.0–2.3)
 1.3 (0.5–3.8)

daily
 2.7 (1.5–5.1) ‡
 0.4 (0.1–1.1)
 2.6 (1.5–4.6) ‡
 1.5 (0.7–2.9)
 1.6 (0.7–3.7)
 1.0 (0.4–2.5)

*SOBDE = shortness of breath during exercise, † p < 0.05, ‡ p = 0.001

Vrijlandt et al. Respiratory Research 2005 6:117   doi:10.1186/1465-9921-6-117