Measurement Properties of the Brazilian-Portuguese Version of the Lumbar Spine Instability Questionnaire

Abstract

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Effectiveness of graded activity versus physiotherapy in patients with chronic nonspecific low back pain: midterm follow up results of a randomized controlled trial

“…So, although the LSIQ is promising and can be of some importance if can predict graded activity or motor control exercise, we cannot oversell its importance at this stage until further evidence shows otherwise. 36 …”

A Screening Tool for Patients With Lumbar Instability

“…The screening tool questions are presented in Table 1 . It has undergone cross-cultural translation 13 , 14 and its reliability has been tested. 13 – 15 Briefly, the questionnaire comprises 14 items related to how the patient feels and his or her behavior, activity, and positions adopted.…”

“… 8 Lumbar instability signs were subsequently used in later studies by other investigators as inclusion criteria for patients with lumbar instability 10 , 11 and for monitoring the effect of exercise intervention on these patients. 12 Subsequently, the questionnaire was translated into Thai and Brazilian Portuguese 13 , 14 and its reliability tested. 13 – 15 Chatprem et al 13 (in press) developed a Thai version of the lumbar instability screening tool for physical therapists to administer to patients with CLBP.…”

Which Exercise for Low Back Pain? (WELBack) trial predicting response to exercise treatments for patients with low back pain: a validation randomised controlled trial protocol

“…27 It has face validity, good internal consistency and 22 moderate to high test-retest reliability (intraclass correlation coefficient (ICC)=0.75). 77 78 A recently published Rasch analysis demonstrated the questionnaire to be unidimensional. 78 The measure has not been validated against any objective measure of 'instability', and there is discussion whether this questionnaire reflects other mechanisms, such as underlying physiological pain mechanism.…”

“…The effect modification analysis will be conducted for the primary outcome and secondary outcomes separately. Linear mixed models with terms for participants (fixed), treatment group, treatment group×time (for the effectiveness analysis), predictor (potential effect modifier such as LSIQ), treatment group×predictor (for the effect modification analysis), 77 physiotherapists, treatment group×physiotherapists and baseline score for the dependent variable will be constructed. A prespecified threshold of 15 units will be used for a clinically important interaction effect.…”