S = 0 if: | Between 0 and 10: | S = 10 if: | |

Lateral lumbar flexion* (cm) | A⩾21.1 | S = (21.1−A)/2.1 | A⩽0.1 |

Tragus-to-wall distance* (cm) | A⩽8 | S = (A−8)/3 | A⩾38 |

Lumbar flexion (modified Schober) (cm) | A⩾7.4 | S = (7.4−A)/0.7 | A⩽0.4 |

Intermalleolar distance (cm) | A⩾124.5 | S = (124.5−A)/10 | A⩽24.5 |

Cervical rotation angle* (°) | A⩾89.3 | S = (89.3−A)/8.5 | A⩽4.3 |

*For lateral lumbar flexion, tragus-to-wall distance, and cervical rotation the average of right and left should be taken.

If a score lies beyond the range 0–10, the values 0 or 10 have to be used, respectively. For facilitating computer calculations with “if... then... else” fields in a table calculation program such as Microsoft Excel, the limits of the linear ranges are also given. The BASMI

_{lin}is the mean of the five scores.BASMI, Bath Ankylosing Spondylitis Metrology Index.