The influence of age and subluxation degree on pelvic parameters in patients with degenerative lumbar spondylolisthesis / 中国医师进修杂志

ABSTRACT

Objective To study the influence of age and subluxation degree on pelvic parameters in patients with degenerative lumbar spondylolisthesis.Methods One hundred and eighteen patients with degenerative lumbar spondylolisthesis (L4) were selected.The patients were divided into 3 groups according to agegroup Ⅰ 38 cases,age ＜ 35 years;group Ⅱ 43 cases,age 35-50 years;and group Ⅲ 37 cases,age ＞ 50 years.The severity degree of subluxation (Meyerding degree) and sagittal pelvic parameters including pelvic incidence (PI),sacrum slope (SS) and pelvic tilt (PT) were measured according to lateral X-ray film.The sagittal pelvic parameters were compared among different age and subluxation degree.Results There were no statistical difference in PI,SS and PT among the different age (P ＞ 0.05).Meyerding Ⅰ degree was in 86 cases,and Meyerding Ⅱ degree was in 32 cases.There was no statistical difference in PI between Meyerding Ⅰ degree and Meyerding Ⅱ degree (P ＞ 0.05).The SS in Meyerding Ⅱ degree was significantly higher than that in Meyerding Ⅰ degree(48.2 ± 4.0)° vs.(40.4 ± 3.5)°,and there was statistical difference (P＜ 0.05).But the PT in Meyerding Ⅱ degree was significantly lower than that in Meyerding Ⅰ degree(17.3 ± 2.1)° vs.(26.6 ± 3.5)°,and there was statistical difference (P ＜ 0.01).Conclusion In patients with degenerative lumbar spondylolisthesis,the age and subluxation degree can not affect the PI,but the subluxation degree increasing can decrease PI and increase SS.