Latimer J, Lee M, Adams R, Moran C M
School of Physiotherapy, University of Sydney, Australia.
J Manipulative Physiol Ther. 1996 Nov-Dec;19(9):587-91.
To investigate the relationship between low back pain (LBP) and lumbar posteroanterior (PA) stiffness.
A repeated-measures design was used to measure lumbar posteroanterior stiffness on two occasions in subjects with and without LBP.
Twenty-five subjects with acute or subacute LBP and twenty-five pain-free subjects participated. Pain subjects reported pain on the application of a manual PA force to the lumbar spine and had no contraindication to PA stiffness testing. Pain-free subjects reported no history of LBP requiring treatment, and obtained a score of 0 on the McGill Pain Questionnaire.
PA stiffness was measured in subjects with LBP when (a) they first presented with pain and (b) when pain had resolved by more than 80%. Pain-free subjects, matched with pain subjects on gender, age, vertebral level to be tested and time between tests, were also measured on two occasions, to control for the effects of repeated stiffness testing and the passing of time.
In subjects with low back pain stiffness decreased by 1.21 N/mm between test 1 and test 2. A paired t test found a significant difference between the tests (t = 3.04, df = 24, p = .006). In subjects without pain, there was an increase in stiffness of 0.74 N/mm between test 1 and test 2; a paired t test found no significant difference between the tests (t = -1.673, df = 24, p = .107).
Subjects with LBP showed increased PA stiffness compared with when they had little or no pain, whereas pain-free subjects showed unchanged PA stiffness over time.
探讨下腰痛（LBP）与腰椎前后（PA）刚度之间的关系。
采用重复测量设计，在有和没有下腰痛的受试者中两次测量腰椎前后刚度。
25名急性或亚急性下腰痛患者和25名无疼痛受试者参与。疼痛受试者在对腰椎施加手动PA力时报告疼痛，且无PA刚度测试的禁忌症。无疼痛受试者报告无需要治疗的下腰痛病史，且在麦吉尔疼痛问卷上得分为0。
在患有下腰痛的受试者中测量PA刚度，（a）当他们首次出现疼痛时，以及（b）当疼痛缓解超过80%时。与疼痛受试者在性别、年龄、要测试的椎体水平和两次测试之间的时间相匹配的无疼痛受试者也进行两次测量，以控制重复刚度测试和时间推移的影响。
在下腰痛受试者中，测试1和测试2之间刚度降低了1.21N/mm。配对t检验发现两次测试之间存在显著差异（t = 3.04，df = 24，p = .006）。在无疼痛受试者中，测试1和测试2之间刚度增加了0.74N/mm；配对t检验发现两次测试之间无显著差异（t = -1.673，df = 24，p = .107）。
与几乎没有或没有疼痛时相比，患有下腰痛的受试者显示出PA刚度增加，而无疼痛受试者随时间推移PA刚度没有变化。
