Anterior superior iliac spine asymmetry assessment on a novel pelvic model: an investigation of accuracy and reliability

Reliability and validity of a new clinical test for assessment of the sacroiliac joint dysfunction

Background:

Dysfunctional sacroiliac joint (SIJ) has been cited as a source of low backache (LBA). Numerous non-invasive clinical tests are available for its assessment having poor validity and reliability which challenges their clinical utility. Thus, introduction of a new clinical test may be necessary.

Objective:

To assess reliability and validity of a new clinical test for the assessment of patients with SIJ movement dysfunction.

Methods:

Forty-five subjects (23 having LBA of SIJ origin and 22 healthy asymptomatic volunteers) with mean age 28.62 +∕− 5.26 years were assessed by 2 blinded examiners for 3 different clinical tests of SIJ, including the new test. The obtained values were assessed for reliability by intraclass correlation, kappa coefficient and percentage agreement. Validity was assessed by averaging sensitivity and specificity. Positive and negative predictive values and accuracy were assessed.

Results:

The new test demonstrates good intra- (r=0.81) and inter-rater (r=0.82) reliability with substantial agreement between raters (k>0.60). It has 79.9% validity, 82% sensitivity, 77% specificity, 79% positive-predictive, 80% negative-predictive value and accuracy.

Conclusion:

The new “Shimpi Prone SIJ test” has a good intra- and inter-rater reliability with a substantial rater agreement and a good validity and accuracy for the assessment of patients with SIJ movement dysfunction.

Interrater Reliability of Osteopathic Sacral Palpatory Diagnostic Tests Among Osteopathy Students

Context

Somatic dysfunctions are a key element of osteopathic practice. The evaluation of somatic dysfunctions is achieved by assessment of the TART (tissue texture abnormality, asymmetry, restriction of motion, tenderness) parameters. The reliability of a diagnostic method is the crux of successful treatment. Interrater reliability of osteopathic palpatory diagnostic tests have been studied on different anatomical areas, but there are no studies on the evaluation of all of the TART parameters on the sacrum.

Objective

To evaluate the interrater reliability of osteopathic sacral palpatory diagnostic tests. The hypothesis was that 3 trained osteopathy students at the end of their curriculum could achieve at least moderate agreement on osteopathic sacral palpatory diagnostic tests.

Methods

Three students from the Centre pour l’Étude, la Recherche et la Diffusion Ostéopathiques school in Rome, Italy, at the end of their curriculum participated as raters and received consensus training. Eligible subjects among students of the same school were recruited on a voluntary basis to be tested. All of the raters tested the sacrum by evaluating the TART parameters on every subject for 3 minutes. Raters were blinded to the other raters’ findings. Interrater reliability was evaluated using Fleiss κ statistics.

Results

Fifty-two subjects (20 women) were enrolled in the study. Mean (SD) age was 25.9 (7.03) years; height, 1.73 (0.09) ms; weight, 68.73 (14.2) kg; and body mass index, 22.66 (3.58). Agreement was fair for tissue texture abnormality (κ=0.28), asymmetry (κ=0.29), restriction of motion (κ=0.32), and tenderness (κ=0.34); agreement was slight for landmark position (κ=0.06) and diagnosis of somatic dysfunction (κ=0.17).

Conclusion

Results showed a level of agreement ranging from slight to fair in the assessment of the TART parameters among raters, who were in their last year of osteopathy school. The tenderness parameter was the most reliable. Our findings are consistent with other interrater reliability studies carried out in different body regions, contributing to show an overall heterogeneous level of diagnostic reliability in osteopathy.

Use of real-time physiologic parameter assessment to augment osteopathic manipulative treatment training for first-year osteopathic medical students

CONTEXT

The first 2 years of osteopathic medical school involve training in osteopathic principles and practice, including understanding the tenets of osteopathic medicine and developing palpatory skills for clinical application. Although this training emphasizes the link between somatic dysfunction and physiologic function, it does not include the opportunity for students to quantitatively assess the physiologic effect of osteopathic manipulative treatment (OMT) using physiologic measurements.

OBJECTIVE

To evaluate an approach for integrated OMT training coupled with physiologic measurements of relevant parameters, whereby first-year osteopathic medical students assess the quantitative, real-time changes in specific physiologic signals during instruction.

METHODS

During mandatory musculoskeletal and cardiovascular demonstration laboratories at a single osteopathic medical school, students were divided into small groups and performed OMT on each other while recording real-time measurements of physiologic functions such as maximum clench force, time to fatigue for the forearm flexor muscles, heart rate, and peripheral vascular flow. After data were collected, students analyzed pre- and post-OMT measurements and discussed underlying physiologic principles in a large group format. At the end of the sessions, students completed a brief survey on the usefulness of the integrated laboratories.

RESULTS

Overall, 13 of 28 student groups (46.4%) measured a pre- to post-OMT increase in maximum clench force, and 16 (57.1%) observed an increase in time to fatigue for the forearm flexor muscles. Twenty-three of 27 student groups (85.2%) observed a reduction in heart rate and 19 (70.4%) measured an increase in peripheral vascular flow after OMT. Student satisfaction was generally favorable, with overall mean (SD) ratings of 6.38 (1.86) for the musculoskeletal laboratory and 7.81 (1.69) for the cardiovascular laboratory out of a maximum of 10 points. In open-ended comments, students deemed the combined laboratories as clinically applicable but desired more time for completing the laboratories.

CONCLUSION

Measurement of specific physiologic musculoskeletal and cardiovascular parameters before and after OMT enabled quantification of physiologic responses to OMT. Students' favorable feedback indicated that the quality of learning in the laboratories was enhanced by the addition of physiologic measurements.

Assessing palpation thresholds of osteopathic medical students using static models of the lumbar spine

CONTEXT

Although spinal somatic dysfunction diagnosis is taught at all colleges of osteopathic medicine, few objective measures have been used to evaluate student accuracy.

OBJECTIVE

To assess the palpatory skills of osteopathic medical students in evaluating positional asymmetry in the transverse plane using static block transverse process and lumbar spine models.

METHODS

For this observational study, first-year osteopathic medical students completed 3 palpatory assessments using uncovered and covered block transverse process and lumbar spine models to simulate a range of positional asymmetries of the transverse processes. With use of logistic regression, 80%, 90%, and 95% thresholds were defined as the magnitude of asymmetry for which the predicted probability of students correctly determining the direction of asymmetry exceeded a specified amount (.80, .90, or .95).

RESULTS

A total of 346 students completed the assessments. For the uncovered block transverse process model (assessment 1), students correctly identified the direction of asymmetry with .89 probability at 1 mm of asymmetry (80% threshold), .94 probability at 2 mm (90% threshold), and .95 probability at 3 mm (95% threshold). For the covered block transverse process model, students correctly identified the direction of asymmetry with .80 probability at 1 mm (80% threshold), .92 probability at 2 mm (90% threshold), and .98 probability at 3 mm (95% threshold) by the third assessment. For the uncovered lumbar spine model (assessment 2), students correctly identified the direction of asymmetry with .93 probability at 2 mm (80% and 90% thresholds) and .95 probability at 3 mm (95% threshold). For the covered lumbar spine model (assessments 2 and 3), students correctly identified the direction of asymmetry with .87 probability at 4 mm (80% threshold); 90% and 95% thresholds were not reached with the range of asymmetries tested.

CONCLUSION

Most first-year osteopathic medical students were able to discern the direction of positional asymmetry of transverse processes on static models. Depending on the model type, student performance improved (block transverse process models) or declined (lumbar spine models) over time. Future studies should evaluate whether accuracy of palpating lumbar spine models translates to accuracy of palpating human lumbar spines.

Leg length discrepancy and osteoarthritic knee pain in the elderly: an observational study

CONTEXT

Osteoarthritic knee pain is very common, as are leg length discrepancies (LLDs). The relationship between LLDs and osteoarthritic knee pain is not well understood.

OBJECTIVE

To confirm a clinical impression that osteoarthritic knee pain is more common in the short (ie, superior-presenting) leg, as measured by supine physical examination of 3 bony landmarks: the medial malleoli, the anterior superior iliac spines, and the iliac crests. The secondary objective was to measure the relative positions of the 3 bony landmarks to better understand functional contributions to LLD.

METHODS

A prospective single-occasion observational design was used. Patients who reported osteoarthritic knee pain during an office visit were recruited, and data were collected on 3 bony landmarks and which knee was usually most painful.

RESULTS

Of the 32 participants who were recruited, 28 were women and 4 were men. Of the 17 participants who reported having right knee pain, 10 had a short right leg and 7 had a short left leg. Of the 15 participants who reported having left knee pain, 13 had a short left leg, 1 had a short right leg, and 1 had equal leg lengths. Knee pain was most severe in the short leg for 23 of 32 participants (71.9%). The most common pattern was for both iliac crests to be equal and the short leg to be concordant with a superior anterior superior iliac spine, which occurred in 23 of 32 participants (71.9%). In the present study population, the magnitude of LLD ranged from 0 to 2.1 cm.

CONCLUSION

Osteoarthritic knee pain was more common in the apparent short leg. More sophisticated studies, including investigations into the role of pelvic torsion in knee pain, as well as investigations for interoperator reliability and validity, are needed to build on the findings reported in this observational study.