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Table 1 Body mass index and lung function of study populations included in the genotype-outcome association analyses

From: Role of DNA methylation in the association of lung function with body mass index: a two-step epigenetic Mendelian randomisation study

MR stepStudyNAge (years), median (IQR)BMI (kg/m2), median (IQR)FEV1 (L), median (IQR)FVC (L), median (IQR)FEV1/FVC (%),median (IQR)
1stECRHS47055 (49–60)26.0 (23.3–29.3)2.9 (2.4–3.5)3.8 (3.2–4.6)76 (72–80)
NFBC196668146 (46–47)25.8 (23.3–29.1)3.4 (2.9–4.0)4.4 (3.8–5.2)77 (74–81)
SAPALDIA90658 (50–68)25.9 (23.3–29.3)2.9 (2.4–3.5)4.0 (3.3–4.8)74 (69–78)
2ndECRHS77354 (48–60)26.3 (23.8–29.8)2.9 (2.5–3.5)3.9 (3.3–4.7)76 (72–80)
NFBC1966450147 (46–47)26.1 (23.5–29.4)3.3 (2.9–3.9)4.3 (3.7–5.1)78 (74–82)
SAPALDIA230360 (50–67)25.7 (23.1–28.6)3.0 (2.5–3.6)4.1 (3.4–4.9)74 (69–78)
UK Biobank275,86158 (50–63)26.6 (24.1–29.7)2.7 (2.3–3.3)3.6 (3.0–4.3)77 (73–80)
  1. MR Mendelian randomisation. IQR Interquartile range. BMI Body mass index. FEV1 Forced expiratory volume in one second. FVC Forced vital capacity