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Table 3 Coefficients (95%-confidence intervals) of regression models adjusted for covariates that remained stable in replication analyses

From: Which early life events or current environmental and lifestyle factors influence lung function in adolescents? – results from the GINIplus & LISAplus studies

Spirometric parameter indicative of

Lung volume

Airways & volume

Airflow limitation

Airways

 

FVC, ml

FEV1, ml

FEV1/FVC, %

FEF25–75, ml/s

Sex, male

347 (289, 405)

220 (167, 274)

−2.2 (−2.9,-1.4)

 

Age, IQR years

47 (26, 69)

30 (11, 50)

  

Height, IQR cm

637 (598, 676)

517 (481, 553)

 

508 (438, 577)

Early life events

 Peak weight velocity, IQR kg/month

  

−0.8 (−1.3, −0.3)

−88 (−155, −20)

 Lung infections (up to age 3), yes

 

−55 (−102, −7)

−1.1 (−1.8,-0.3)

−159 (−258, −60)

Environment & lifestyle at age 15

 Regular indoor second-hand smoke exposurea, yes

 

−59 (−114, −5)

  

 Serum vitamin Db, IQR nmol/l

65 (34, 96)

32 (3, 61)

−0.6 (−1, −0.2)

 

 Body mass index, IQR kg/m2

222 (194, 250)

144 (118, 171)

−1.2 (−1.6,-0.8)

85 (31, 140)

Allergic diseases at age 15

 Asthma, yes

−118 (−216, −21)

−177 (−268, −86)

−1.8 (−3.1,-0.4)

−304 (−494, −115)

Study specific

 Study (LISAplus vs GINIplus)

68 (12, 124)

   

 Study center (Wesel vs Munich)

−66 (−119, −13)

−135 (−182, −88)

−1.6 (−2.3,-0.9)

−256 (−352, −161)

  1. All associations were statistically significant (p-value < 0.05). Estimates for continuous variables are presented per interquartile range (IQR) increase (IQR: age (0.26 years), height (11 cm), peak weight velocity (0.28 kg/month), vitamin D (32.35 nmol/l), body mass index (3.56 kg/m2))
  2. aat least once a week or more. bseason-adjusted 25(OH)D concentration. FEV1: forced expiratory volume in 1 s. FVC: forced vital capacity. FEF25–75: mean flow rate between 25 and 75% of FVC