Variable | β | 95% CI | Explained variance^{*} (%) |
---|---|---|---|

Ln (time) | 0.044 | 0.031 to 0.057^{*} | 20 |

Previous HAQ | 0.234 | 0.213 to 0.255^{*} | 20 |

Previous DAS | 0.213 | 0.200 to 0.226^{*} | 28 |

Delta DAS (current DAS–previous DAS) | 0.183 | 0.166 to 0.200^{*} | 37 |

Previous DAS×delta DAS | 0.022 | 0.016 to 0.027^{*} | 37 |

DAS, disease activity score; HAQ, health assessment questionnaire; ln (time), natural logarithm of time since baseline; LMM, linear mixed model.

The intercept is −0.037 with a p value of 0.145.

βrepresents results of final multivariable LMM. In the right-hand column the increasing explained variance of the model is given (compared with a LMM with only a random intercept), by adding first a random slope with ln time (explained variance 18%), and then one by one the variables shown in the table.

↵* p<0.05.