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Objective: To examine the relationship between sagittal balance parameters and different symptoms of spinal disease in patients with lumbar canal stenosis (LCS) and controls. Methods: In this prospective, diagnostic, case-control study, we included all patients consecutively admitted to a public teaching hospital for surgical treatment of LCS between July 2010 and October 2011, aged more than 40 years, with back pain plus radiculopathy or neurogenic claudication, and controls without LCS. Magnetic resonance and x-rays allowed the measurement of sagittal axis parameters. Clinical data, the Oswestry Disability Index and the visual analogue scale of pain were assessed. Results: 23 patients were in the Stenosis group, and 17 were controls. The Stenosis group presented lower values of total lumbopelvic lordosis and regional lordosis L1, L2 and L3. In LCS patients and back pain, total lumbopelvic and regional lordosis at L1, L2 and L3 were smaller. Those with stenosis and radiculopathy had higher values of pelvic tilt and lower total lumbopelvic lordosis and regional lordosis in L1 and L2. In patients with claudication, regional lumbopelvic lordosis in L1 and L2 and the T9 sagittal offset were smaller. All patients with pain had higher values of thoracic kyphosis, regional lumbopelvic lordosis in L1, lower values for pelvic tilt, sagittal T1 offset, sacro-femoral distance and overhang compared to patients without pain. Conclusions: This study shows significant correlations between symptoms and sagittal axis parameters between patients with and without spinal canal stenosis and also in subgroups of the patients with stenosis with different complaints. correlAtion between symptoms And sAgittAl Alignment pArAmeters in pAtients with lumbAr cAnAl stenosis: A cAse-control study

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OBJETIVOS: Verificar a relação entre o grau de estenose do canal lombar (ECL) com a ressonância nuclear magnética (RM) e a gravidade da disfunção, de acordo com o Índice de Oswestry em pacientes com ECL e em controles. MÉTODOS: Vinte e três pacientes com diagnóstico de ECL foram comparados com grupo controle de 17 voluntários. Todos foram submetidos a RM e responderam ao questionário de Oswestry. A análise estatística utilizou o teste exato de Fisher, de Mann-Whitney e de Spearman. RESULTADOS: Dor lombar foi a queixa mais frequente em ambos os grupos. O índice de Oswestry mostrou disfunção, em média, em 45,69% no grupo ECL e 11,60% no controle. A RM revelou que a área longitudinal do saco dural, o diâmetro do canal e os recessos laterais e forames estavam igualmente alterados em ambos os grupos. CONCLUSÕES: Não houve correlação entre o grau de estenose e o índice de Oswestry nos dois grupos.