Development and validation of a nomogram for postoperative sleep disturbance in adults: a prospective survey of 640 patients undergoing spinal surgery

Table 2 Coefficients of the LASSO regression model

Factors	Coefficients
Gender(female / male)	0.096
BMI(kg/m²)	0.002
Diabetes mellitus (Yes/ No)	0.004
Preoperative sleep disorder (Yes / No)	0.135
Bleeding volume(mL)	0.001
VAS score	0.059
SAS score	0.003
Satisfaction with ward environment (No / Yes)	0.033
Use of dexmedetomidine (Yes / No)	-0.073
Use of ESPB (Yes / No)	-0.107
Midazolam(mg)	0.001

BMI: body mass index, VAS: visual analogue scale, SAS: self-rating anxiety scale, ESPB: erector spinae plane block

ISSN: 1471-2253