Table 2

 Differences in mean FEV1 % predicted values according to TNFα genotypes

TNFα SNPMean (SD) FEV1 (% predicted)*Mean difference95% CIp value†
*The analysis was performed by a two sample t test. There may be a difference in the number of genotypes/alleles typed for the different SNPs because gap filling of data could not always be done successfully.
†Significant results are shown in bold.
+691g ins/del ins/ins (n = 100)ins/del (n = 13)
67.5 (23.0)79.7 (12.8)12.23.5 to 21.0 0.008
851c/tcc (n = 82)ct +tt (n = 30)
66.9 (23.6)72.6 (20.2)5.7−15.3 to 4.00.25
−308g/a gg (n = 90)ga +aa (n = 22)
66.9 (22.7)74.8 (22.4)7.9−2.8 to 18.60.15
−238g/a gg (n = 101)ga+aa (n = 11)
68.2 (22.4)70.4 (27.6)2.2−16.6 to 21.10.8