1) Weinstein MC, Torrance G, McGuire A. QALYs:the basics. Value Health 2009;12(Suppl 1):S5-9.
2) Hirth RA, Chernew ME, Miller E, et al. Willingness to pay for a quality-adjusted life year:in search of a standard. Med Decis Making 2000;20(3):332-42.
3) Losina E, Walensky RP, Kessler CL, et al. Cost-effectiveness of total knee arthroplasty in the United States:patient risk and hospital volume. Arch Intern Med 2009;169(12):1113-21.
4) Rampersaud YR, Tso P, Walker KR, et al. Comparative outcomes and cost-utility following surgical treatment of focal lumbar spinal stenosis compared with osteoarthritis of the hip or knee:part 2--estimated lifetime incremental cost-utility ratios. Spine J 2014;14(2):244-54.
5) Enyo Y, Yoshimura N, Yamada H, et al. Radiographic natural course of lumbar degenerative spondylolisthesis and its risk factors related to the progression and onset in a 15-year community-based cohort study:the Miyama study. J Orthop Sci 2015;20(6):978-84.
6) Ghogawala Z, Dziura J, Butler WE, et al. Laminectomy plus fusion versus laminectomy alone for lumbar spondylolisthesis. N Engl J Med 2016;374(15):1424-34.
7) Försth P, Ólafsson G, Carlsson T, et al. A randomized, controlled trial of fusion surgery for lumbar spinal stenosis. N Engl J Med 2016;374(15):1413-23.
8) Fischer CR, Cassilly R, Dyrszka M, et al. Cost-effectiveness of lumbar spondylolisthesis surgery at 2-year follow-up. Spine Deform 2016;4(1):48-54.
9) Alvin MD, Lubelski D, Abdullah KG, et al. Cost-utility analysis of instrumented fusion versus decompression alone for grade I L4-L5 spondylolisthesis at 1-year follow-up:a pilot study. Clin Spine Surg 2016;29(2):E80-6. doi:10.1097/BSD.0000000000000103.
10) Yagi M, Fujita N, Okada E, et al. Comparisons of direct costs, outcomes, and cost-utility of decompression surgery with fusion versus decompression alone for degenerative lumbar spondylolisthesis. J Orthop Sci 2018;23(4):653-7.
11) Tosteson AN, Lurie JD, Tosteson TD, et al. Surgical treatment of spinal stenosis with and without degenerative spondylolisthesis:cost-effectiveness after 2 years. Ann Intern Med 2008;149(12):845-53.
12) Devin CJ, Chotai S, Parker SL, et al. A cost-utility analysis of lumbar decompression with and without fusion for degenerative spine disease in the elderly. Neurosurgery 2015;77(Suppl 4):S116-24.
13) Fujimori T, Miwa T, Iwasaki M, et al. Cost-effectiveness of posterior lumbar interbody fusion in the Japanese universal health insurance system. J Orthop Sci 2018;23(2):299-303.
14) Fujimori T, Miwa T, Iwasaki M, et al. Cost-effectiveness of lumbar fenestration surgery in the Japanese universal health insurance system. J Orthop Sci 2018;23(6):889-94.
15) Adogwa O, Parker SL, Davis BJ, et al. Cost-effectiveness of transforaminal lumbar interbody fusion for Grade I degenerative spondylolisthesis. J Neurosurg Spine 2011;15(2):138-43.