Influence of preoperative nucleus pulposus status and radiculopathy on outcomes in mono-segmental lumbar total disc replacement: results from a nationwide registry

Table 3 Outcomes.

	DDD	HNP-No rad.	Stenosis	HNP-Rad.
Preop. back pain	70.2	72.5	67.8	68.1
Postop. back pain	*28.1*	*27.3*	41.8*	*30.3*
Back pain relief: unadjusted	*42.2*	*45.2*	26.0*	37.8
Back pain relief: adjusted	*49.8*	45.9	32.6*	*45.2*
Preop. leg pain	*52.1*	*47.3*	55.0	62.3*
Postop. leg pain	*20.1*	20.2	31.5*	23.9
Leg pain relief: unadjusted	31.7	27.1	23.5*	*38.4*
Leg pain relief: adjusted	*34.7*	33.4	21.8*	*34.0*
Preop. quality of life	0.326	0.371	0.336	0.350
Postop. quality of life	0.753	0.784	0.702	0.754
Improvement of quality of life: unadjusted	0.427	0.413	0.366	0.404
Improvement of quality of life: adjusted	0.317	0.321	0.271	0.299

Unadjusted and adjusted back and leg pain relief and improvement of quality of life are shown in each group. Asteriks marks the group which was significantly different to another group in bold. As adjustment factors, gender, age, preoperative pain medication, intervertebral level of the intervention, pharmacologically treated depression, type of work and working activity level were employed.