[Objective]To investigate the effects of degenerative lumbar spinal stenosis(DLSS)involved segments on sagittal spinopel-vic parameters.[Methods]A retrospective analysis was performed on 192 patients with DLSS admitted to our hospital from November 2019 to November 2021.According to the imaging,72 cases had DLSS involved a single segment(SS),63 cases involved double segments(DS),and 57 cases involved multiple segments(MS).The clinical and imaging data of the three groups were compared.[Results]There was no sig-nificant difference in lumbar VAS score,leg VAS score and ODI score among the three groups(P＞0.05),but the disease course was ranked down-up in a sequence of SS＜DS＜MS[(30.5±35.2)months vs(55.9±44.4)months vs(82.3±70.0)months,P＜0.001].In term of imaging,the lumbar lordosis(LL)[(43.4±10.4)° vs(41.1±7.6)° vs(35.6±8.4)°,P＜0.001],thoracic kyphosis(TK)[(28.6±7.1)° vs(27.9±7.6)° vs(23.2±7.3)°,P＜0.001],sacral slope(SS)[(31.0±6.2)° vs(29.6±5.0)° vs(26.0±5.1)°,P＜0.001]were all ranked up-down as SS＞DS＞MS,whereas the pelvic tilt(PT)was ordered down-up as SS＜BS＜MS[(21.6±7.0)° vs(21.8±4.2)° vs(24.9±6.5)°,P=0.005].[Conclusion]As the DLSS involved seg-ment number increases,the lumbar lordosis,thoracic kyphosis and sacral inclination decrease,whereas the pelvic inclination increases.
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