Table 3.

Specific perioperative complications in 673 spinal stenosis surgeries

Variable	Age group (yr)										p-value
	20–64		65–74		75–84		≥ 85		Overall
	Total	Major	Total	Major	Total	Major	Total	Major	Total	Major
Medical complications
Delirium	3.8	0	3.6	0	14	0.6	27	3.0	7.6	0.3	< 0.001*
Respiratory	0.8	0.4	2.7	0	2.8	1.1	9.1	6.1	2.4	0.7	0.029*
Urological	0.8	0	2.3	0.5	2.2	1.1	3.0	0	1.8	0.4	0.58
Digestive	1.3	0.4	0	0	4.4	0.6	0	0	1.6	0.3	0.004*
Transfusion	0	0	0.9	0	3.3	0	6.1	0	1.5	0	0.005*
Cardiovascular	0	0	0.9	0	1.7	0	9.1	0	1.2	0	< 0.001*
Stroke	0	0	0.5	0.5	0.6	0.6	6.1	3.0	0.6	0.4	< 0.001*
Drug allergy	0.4	0	0.5	0	0	0	0	0	0.3	0	0.82
Gouty arthritis	0.4	0	0	0	0.6	0	0	0	0.3	0	0.73
Electrolyte abnormalities	0	0	0.5	0	0.6	0	0	0	0.3	0	0.71
Parkinsonism	0.4	0	0	0	0	0	0	0	0.1	0	0.61
Surgical complications
Incidental durotomy	2.5	0.4	2.7	0.5	9.4	0.6	0	0	4.3	0.4	0.001*
Neurological deficits	2.5	0.4	2.7	1.4	2.8	1.7	6.1	0	2.8	1.0	0.76
Fibrin glue use	1.7	0	0.5	0	3.9	0	0	0	1.8	0	0.061
Hematoma	1.3	0.4	1.4	0.5	1.7	1.1	6.1	3.0	1.6	0.7	0.23
Wound dehiscence	1.7	0	0.9	0.5	0	0	0	0	0.9	0.1	0.31
Deep infection	0.4	0.4	0.9	0.5	0.6	0.6	0	0	0.6	0.4	0.88
Graft sinking/migration	1.3	0.4	0	0	0.6	0	0	0	0.6	0.1	0.34
Insufficient decompression	0.4	0.4	0	0	1.1	1.1	0	0	0.4	0.4	0.41
Wrong level laminectomy	0	0	0	0	1.1	0.6	0	0	0.3	0.1	0.14
Retained drain tube	0.4	1.0	0.5	0.5	0	0	0	0	0.3	0.3	0.82
Head pin problem	0.4	0	0	0	0	0	0	0	0.1	0	0.61
Any complications	18.1	NA	17.6	NA	36.5	NA	54.5	NA	24.7	NA	< 0.001*
Any major complications	NA	3.8	NA	4.5	NA	7.2	NA	15.2	NA	5.5	0.034*

Values are presented as percentage.

NA, not available.

^*p<0.05, statistically significant differences.