Can back pain caused by symptom-giving sacroiliac joint relaxation ...

4.2.4. Significance of the test results
The significance of the provocation tests and palpation was verified with the help of
the chi-square test for fourfold tables. Table 4A shows the significance levels. Since
both SIJs of each test person were tested separately, the sample is n=28. Due to the
minimal changes in the pain areas and the resulting lack of significance, the
significance test was not applied to this category.
Test N Z α Significance
Laslett (3 out of 6) 28 7.143 ≤ 0.01 **
ASLR 28 0.717 >0.05
Faber 28 0.820 >0.05
Cranial shear 28 4.667 ≤ 0.05 *
SLR 28 1.948 >0.05
PSIS 28 0.100 >0.05
Iliopsoas muscle 28 5.600 ≤ 0.05 *
Obturator membrane 28 24.257 ≤ 0.001 ***
Sacrotuberous ligament 28 3.818 ≤ 0.05 *
Piriformis muscle 28 7.487 ≤ 0.01 **
Pelvic floor 28 0.747 >0.05
Pubic symphysis 28 12.600 ≤ 0.001 ***
*significant; **very significant; ***highly significant
Table 4A: Evaluation of significance
The palpation of the pubic symphysis and the obturator membrane shows a highly
significant result; the result of the test series according to Laslett and the palpation of
the piriformis muscle are very significant. Furthermore, significant results were
obtained through cranial shear and palpation of the iliopsoas muscle and the
sacrotuberous ligament. On the other hand, the results obtained through the ASLR,
Faber and SLR tests as well as the palpation of the PSIS and the pelvic floor are not
significant.
Master’s Thesis Wolfgang Aspalter 57