Spearman correlation coefficients between BMD at various sites with percentage predicted indices of disease severity
| SK score | BMI | FEV1 | FVC | FEF | CXR | IV | |
| Lumbar spine | 0.37 | 0.37 | 0.29* | 0.32 | 0.28* | –0.272-160 | –0.42 |
| Femoral neck | 0.51 | 0.28* | 0.29* | 0.35 | 0.35 | –0.38 | –0.34 |
| Total body | 0.53 | 0.48 | 0.40 | 0.38 | 0.41 | –0.41 | –0.50 |
All p<0.001 except *p<0.005,
↵2-160 p<0.01.
SK score = Shwachman-Kulczycki clinical score; BMI = body mass index; FEV1 = forced expiratory volume in one second; FVC = forced vital capacity; FEF = forced expiratory flow rate; CXR = Northern chest radiography score; IV = number of intravenous antibiotic treatments in the previous five years.