Table 3

Lung function variables in birthweight groups

Birthweight groupAll <1501 g v >2499 g
birth weight
500–999 g v 1000–1500 g birth weight
500–999 g1000–1500 g>2499 gδ3-15095% CI3-151δ3-15295% CI3-151
Lung function variable (n = 72) (n = 97) (n = 39)
FVC100.6  (13.3)100.6  (12.1)104.8  (12.0)−4.2−8.5  to  0.20.0−3.8  to  3.8
FEV1 93.1 (14.9)96.1 (14.0)104.6 (13.2)−10.1−15.0 to  −5.1−3.0−7.3 to  1.3
FEV1/FVC (%)81.9 (10.6)83.8 (8.9)87.0 (7.0)−4.1−7.4 to  −0.9−1.9−4.8 to  0.9
V′EMAX75% 93.1 (24.0)94.7 (21.6)110.7 (22.1)−16.8−24.7 to  −8.9−1.5−8.6 to  5.5
V′EMAX50% 89.9 (30.5)95.2 (27.1)113.0 (25.7)−20.5−30.3 to  −10.7−5.4−14.1 to  3.4
V′EMAX25% 87.5 (37.1)93.0 (35.5)110.7 (35.1)−20.4−33.0 to  −7.8−5.5−16.6 to  5.6
FEF25–75% 77.0 (26.8)83.3 (25.3)99.1 (23.4)−19.0−27.9 to  −10.1−6.3−14.7 to  1.5
RV112.1 (43.3)114.5 (40.2)117.4 (30.8)−4.1−18.1 to  10.0−2.4−14.7 to  10.0
TLC98.9 (16.0)99.4 (13.1)102.5 (13.9)−3.3−8.3 to  1.7−0.5−4.9 to  3.9
RV/TLC (%)27.5 (9.2)27.5 (7.5)26.8 (6.3)0.7−2.1 to  3.50.1−2.4 to  2.5
• Data expressed as mean (SD), and are % predicted for height, age, and gender, unless otherwise specified.

• 3-150 Difference between all <1501 g and controls.

• 3-151 95% confidence interval for difference between groups.

• 3-152 Difference between 500–999 g and 1000–1500 g groups.