"ligamentum_flavum.csv" contains all data to reproduce reported data

Variable Names: Short Description

ges:			sex, maennlich = male, weiblich = female
diag01-diag03:		diagnosis 01 - 03, Osteochondrose = osteochondrosis, Gefuegestoerung = structural instability, Skoliose = scoliosis
er:			estrogen receptor, quantitative as IRS (product score, values 0-12)
sairyo_fibr_abs:	fibrosis according to Sairyo, quantitative (percentage of total area)
sairyo_fibr_score:	fibrosis score according to Sairyo, quantitative (0-4)
sairyo_elast_abs:	loss of elastic fibers according to Sairyo, quantitative (percentage of total area)
sairyo_elast_score:	score of loss of elastic fibers according to Sairyo, quantitative (0-4)
okuda_deg:		degeneration of elastic fibers according to Okuda, mild = mild, moderate = moderate, schwer = severe
okuda_prolif:		proliferation of elastic fibers according to Okuda, mild = mild, moderate = moderate, schwer = severe
okuda_elast:		loss of elastic fibers according to Okuda, mild = mild, moderate = moderate, schwer = severe
alter:			age, in years
BSV_Kontrollgruppe:	control group, yes = control group, no = patient group
Osteochondrose:		diagnosis of osteochondrosis, yes = osteochondrosis reported, no = osteochondrosis not reported
SKS:			diagnosis of spinal stenosis, yes = spinal stenosis reported, no = spinal stenosis not reported
Skoliose:		diagnosis of scoliosis,	yes = scoliosis reported, no = scoliosis not reported
Kontr_vs_Pat:		patient or control group, Patient = patient, Kontrolle = control group
er_dich:		estrogen receptor dichotomized,	IRS <= 1 = negative, IRS <= 2 positive
okuda_deg_score:	degeneration of elastic fibers according to Okuda, 1 = mild, 2 = moderate, 3 = severe
okuda_prolif_score:	proliferation of elastic fibers according to Okuda, 1 = mild, 2 = moderate, 3 = severe
okuda_elast_score:	loss of elastic fibers according to Okuda, 1 = mild, 2 = moderate, 3 = severe
contr_vs_pat:		patient or control group, patient = patient group, control = control group
sex:			sex, male, female

Sairyo: Sairyo, K.; Biyani, A.; Goel, V.; Leaman, D.; Booth, R.J.R.; Thomas, J.; Gehling, D.; Vishnubhotla, S.L.; Long, R.; Ebraheim, N. Pathomechanism of ligamentum flavum hypertrophy: A multidisciplinary investigation based on clinical, biomechanical, histologic, and biologic assessments. Spine 2005, 30, 2649-2656.
Okuda: Okuda, T.; Baba, I.; Fujimoto, Y.; Tanaka, N.; Sumida, T.; Manabe, H.; Hayashi, Y.; Ochi, M. The Pathology of Ligamentum Flavum in Degenerative Lumbar Disease. Spine 2004, 29, 1689-1697. https://doi.org/10.1097/01.BRS.0000132510.25378.8C.