Significance of preoperative peripheral blood neutrophil-lymphocyte ratio in predicting postoperative survival in patients with multiple myeloma bone disease

Table 7 Kaplan–Meier analysis of postoperative survival of patients with multiple myeloma bone disease (univariate survival analysis)

Characteristic	Chi-square	P value
Gender	1.703	0.192
ISS stage	1.966	0.374
Number of lesions	7.055	0.029a
Site of lesion	8.160	0.017a
Isotype	1.526	0.676
Preoperative chemotherapy	0.387	0.534
Postoperative chemotherapy	35.837	0.000a
Preoperative radiotherapy	0.908	0.341
Time from a diagnosis to surgery	1.841	0.606
Operation scheme	3.583	0.167
Stem cell transplantation	2.836	0.092
Preoperative peripheral blood NLR ≥ 3	22.192	0.000a
Preoperative nutrition	0.782	0.676
Preoperative performance status	20.775	0.000a
Preoperative MM activity	1.634	0.652

^aP < 0.05.

NLR: Neutrophil-lymphocyte ratio; ISS: International staging system; MM: Multiple myeloma.