Paper of the month October 2023

Sacroiliac joint pain increases repositioning error during active straight leg raising

Morito, T., Kaneoka, K. Sacroiliac joint pain increases repositioning error during active straight leg-raising. Eur Spine J 32, 2042–2047 (2023).
https://doi.org/10.1007/s00586-023-07556-0

Abstract

Purpose

This study aimed to compare the repositioning error (RE) of patients with unilateral sacroiliac joint pain (SIJP) to that of patients with low back pain (LBP) and a healthy control (HC) group. Differences between the symptomatic and asymptomatic sides were also investigated.

Methods

Sixty-six patients with SIJP, LBP, and HC were included in this study. An active straight leg-raising repositioning test (ASLR-Rt) was performed. ASLR was performed three times each on the left and right sides, targeting a set base angle. RE was calculated as the difference between the base angle and the participant’s attempt to adjust the target angle. RE was expressed as constant error (CE) and absolute error (AE).

Results

The CE of the SIJP group (median [interquartile range]) (6.9 [4.6‒10.4]) was significantly higher than that in the LBP group (3.2 [1.3‒7.1]) and the HC group (2.7 [0.3‒4.6]) (P = 0.009, d = 0.91, P < 0.001, d = 1.30). The AE of the SIJP group (7.3[5.0‒10.4]) was also significantly higher than that in the LBP (3.7[2.8‒7.1]) and HC groups (3.0[1.9‒4.2]) (P = 0.003, d = 1.04; P = 0.001, d = 1.57). Comparing the symptomatic and asymptomatic sides in the SIJP group, the symptomatic side (8.0[6.0‒10.6]) was significantly higher than the asymptomatic side (5.7[3.6‒8.1]) in terms of CE (P = 0.05, d = 0.51).

Conclusion

Patients with SIJP increased RE during ASLR, which may be related to impaired proprioception and decreased motor control.

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Dr. Morito presented this paper during our webinar on SIJ dysfunction in athlets in November 2023


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