Joint

Reader

Volume of MSU crystallization (cm^{3})

Intraclass correlation coefficient

Correlation with serum uric acid^{#}


Mean ± SD

95% CI

ICC

95% CI

p

r

p


Left sacroiliac joint (n = 57)

Reader 1

0.900 ± 1.351

0.541–1.258

0.999

0.9980.999

<0.001

NA

NA

Reader 2

0.904 ± 1.340

0.549–1.260

NA

NA

Average

0.902 ± 1.345

0.545–1.259

NA

NA

NA

0.727

<0.001

Right sacroiliac joint (n = 54)

Reader 1

1.078 ± 1.878

0.578–1.619

1.000

0.9991.000

<0.001

NA

NA

Reader 2

1.071 ± 1.878

0.5700–1.612

NA

NA

Average

1.074 ± 1.878

0.574–1.616

NA

NA

NA

0.740

<0.001

Pelvis (n = 154)

Reader 1

5.237 ± 8.942

3.813–6.660

0.999

0.9990.999

<0.001

NA

NA

Reader 2

5.307 ± 9.150

3.850–6.764

NA

NA

Average

5.272 ± 9.044

3.832–6.712

NA

NA

NA

0.896

<0.001

 Values are given as the mean ± standard deviation (mean ± SD)

MSU monosodium urate, ICC intraclass correlation coefficient values, 95% CI 95% confidence interval, r, Spearman rank correlation coefficient, NA not available

^{#}Spearman correlation analysis between serum uric acid and the average volume of MSU crystals