The Orthopedic Center of St. Louis, 14825 N Outer Forty Rd, Suite 200, St Louis, MO 63141, USA.
SPIRITT Research, 12977 N Forty Dr, Suite 200, St Louis, MO 63141, USA.
Spine J. 2018 Jul;18(7):1292-1297. doi: 10.1016/j.spinee.2018.02.023. Epub 2018 Feb 28.
Health-related quality-of-life outcomes have been collected with the Medical Outcomes Study (MOS) Short Form 36 (SF-36) survey. Boston University School of Public Health has developed algorithms for the conversion of SF-36 to Veterans RAND 12-Item Health Survey (VR-12) Physical Component Summary (PCS) and Mental Component Summary (MCS) scores.
The purpose of the present study is to investigate the conversion of the SF-36 to VR-12 PCS and MCS scores.
Preoperative and postoperative SF-36 were collected from patients who underwent lumbar or cervical surgery from a single surgeon between August 1998 and January 2013.
Short Form 36 PCS and MCS scores were calculated following their original instructions. The SF-36 answers were then converted to VR-12 PCS and MCS scores following the algorithm provided by the Boston University School of Public Health. The mean score, preoperative to postoperative change, and proportions of patients who reach the minimum detectable change were compared between SF-36 and VR-12.
A total of 1,968 patients (1,559 lumbar and 409 cervical) had completed preoperative and postoperative SF-36. The values of the SF-36 and VR-12 mean scores were extremely similar, with score differences ranging from 0.77 to 1.82. The preoperative to postoperative improvement was highly significant (p<.001) for both SF-36 and VR-12 scores. The mean change scores were similar, with a difference of up to 0.93 for PCS and up to 0.37 for MCS. Minimum detectable change (MDC) values were almost identical for SF-36 and VR-12, with a difference of 0.12 for PCS and up to 0.41 for MCS. The proportions of patients whose change in score reached MDC were also nearly identical for SF-36 and VR-12. About 90% of the patients above SF-36 MDC were also above VR-12 MDC.
The converted VR-12 scores, similar to the SF-36 scores, detect a significant postoperative improvement in PCS and MCS scores. The calculated MDC values and the proportions of patients whose score improvement reach MDC are similar for both SF-36 and VR-12.
健康相关生活质量的结果已通过医疗结局研究（MOS）短表 36（SF-36）调查收集。波士顿大学公共卫生学院已开发出将 SF-36 转换为退伍军人 RAND 12 项健康调查（VR-12）生理成分综合评分（PCS）和心理成分综合评分（MCS）的算法。
本研究旨在调查 SF-36 向 VR-12 PCS 和 MCS 评分的转换。
从 1998 年 8 月至 2013 年 1 月期间由一位外科医生进行的腰椎或颈椎手术的患者中收集术前和术后的 SF-36。
按照其原始说明计算 SF-36 PCS 和 MCS 评分。然后，根据波士顿大学公共卫生学院提供的算法，将 SF-36 答案转换为 VR-12 PCS 和 MCS 评分。比较 SF-36 和 VR-12 之间的平均得分、术前到术后的变化以及达到最小可检测变化的患者比例。
共有 1968 名患者（1559 名腰椎和 409 名颈椎）完成了术前和术后的 SF-36。SF-36 和 VR-12 的平均得分值非常相似，得分差异范围为 0.77 至 1.82。SF-36 和 VR-12 评分的术前到术后改善均具有高度显著性（p<.001）。平均变化分数相似，PCS 的差异高达 0.93，MCS 的差异高达 0.37。SF-36 和 VR-12 的最小可检测变化（MDC）值几乎相同，PCS 的差异为 0.12，MCS 的差异高达 0.41。SF-36 和 VR-12 的变化分数达到 MDC 的患者比例也几乎相同。SF-36 MDC 以上的患者中约有 90%也在 VR-12 MDC 以上。
转换后的 VR-12 评分与 SF-36 评分相似，可检测到 PCS 和 MCS 评分的术后显著改善。计算的 MDC 值和变化分数达到 MDC 的患者比例对于 SF-36 和 VR-12 均相似。
