Multivariate Analysis of Clinical Findings in Lumbar Disc Herniation.

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The purpose of this paper is to evaluate the weight of various factors which influence the level diagnosis of lumbar disc herniation. The subjects were 415 patients who had been operated for lumbar disc herniation (L3-4, L4-5 and L5-S1). We performed the method of quantification theory type 2 and discriminant analysis (2 groups and 3 groups). Correct discrimination rates of the level diagnosis were examined with 2 parameters for every level. Following results were obtained.1. The factors which influence the level diagnosis were, in order of weight, PTR and sensory of medial side of the lower leg on L4, 1st toe dorsiflexion power and sensory of medial side of the foot on L5, and ATR and sensory of lateral side of the foot on S1 respectively.2. Correct discrimination rates of the level diagnosis were 87-96% when both symptoms were found, and 76-90% when either symptom was found.
西日本整形・災害外科学会の論文