FABP2 and cystic fibrosis: In CF children, serum I-FABP level correlated negatively with lung function (FEV1 r = -.734, p<0.05; FVC r = -.593, p = .054; FEV1/VC r = -.508, p = .110, n = 11, Fig 2A), whereas no correlation was found in adult CF patients.