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Table 1 Detailed group information and postoperative results

From: Instrumented intervertebral or posterolateral fusion in elderly patients Clinical results of a single center

  instrumented PLIF instrumented PLF
Number of patients 54 60
Sex (male/female) 36/18 38/22
Age 75.6 (66-78) 80.5 (73 - 88)
Operation time 143 min 88 min
Blood loss 760 ml (510 - 1100 ml) 470 ml (320 - 580 ml)
Transfusion red cell units 1.88 (0 - 5) 0.35 (0 - 2)
ASA classification   
Class I 0 9
Class II 35 31
Class III 19 20
Number of levels fused 1.5 (1 - 4) 1.8 (1 - 5)
Degenerative spinal stenosis   
monosegmental 39 37
2 segments 6 7
3 segments 7 10
4 segments 2 3
5 segments 0 3
Length of hospital stay 12.6 13.1
Complications   
Screw misplacement 1 0
Repeated decompression 2 1
Adjacent level disease 1 1
Pseudarthrosis 0 5
Fusion rate 41/54 46/60