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Protocol Title : A Randomised, open labelled study in anti ... - EME

Protocol Title : A Randomised, open labelled study in anti ... - EME

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Statistical Methodology<br />

and Analysis<br />

!<br />

1. For the randomized comparison of Rituximab versus<br />

Tocilizumab <strong>in</strong> B-cell poor patients, the primary endpo<strong>in</strong>t<br />

will be analysed (by <strong>in</strong>tent to treat) us<strong>in</strong>g the chisquared<br />

test for the difference between two proportions.<br />

Patients switch<strong>in</strong>g treatment before 6 months because<br />

of lack of response will be considered as nonresponders<br />

at 6 months.<br />

2. For non-randomised comparisons between subgroups<br />

identified by B-cells <strong>in</strong> synovial biopsies, we will use the<br />

Fisher exact test compar<strong>in</strong>g (i) response to Rituximab <strong>in</strong><br />

B-cell poor patients compared to B-cell richThe<br />

def<strong>in</strong>ition of B-cell status will be clearly def<strong>in</strong>ed before<br />

the start of the trial.<br />

3. A test of <strong>in</strong>teraction between treatment and B-cell status<br />

(rich versus poor, exclud<strong>in</strong>g germ<strong>in</strong>al centre) will be<br />

based on a likelihood ratio tests between nested logistic<br />

regression models.<br />

Study: R4RA EudraCT: 2012-002535-28 7 / 34

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