Table 4 Univariate and multivariate logistic regression analyses of factors influencing reoperation.

From: Risk factors for reoperation after lumbar spine surgery in a 10-year Korean national health insurance service health examinee cohort

Variable

Univariable analysis

Multivariable analysis

HR

95% CI

P-value

HR

95% CI

P-value

Sex

Female

1

−

−

1

−

−

Male

1.191

0.908–1.561

0.2064

0.978

0.658–1.453

0.911

Age

40 ~ 49

1

−

−

1

−

−

50 ~ 59

1.109

0.798–1.542

0.5365

1.084

0.776–1.515

0.6349

60 ~ 69

1.251

0.868–1.803

0.2301

1.191

0.814–1.742

0.3672

70 ~ 79

1.034

0.595–1.8

0.9045

1.017

0.573–1.805

0.9544

80 ~ 

1.322

0.183–9.548

0.7818

1.477

0.199–10.951

0.7031

BMI

 < 20

1

−

−

1

−

−

20 <  < 25

1.272

0.667–2.424

0.4657

1.231

0.641–2.365

0.5332

25 < 

1.448

0.755–2.778

0.2652

1.365

0.702–2.654

0.3594

Smoking

No

1

−

−

1

−

−

Yes

1.204

0.893–1.624

0.2241

1.173

0.836–1.646

0.3553

Alcohol drinking

No

1

−

−

1

−

−

Yes

1.099

0.844–1.43

0.4837

1.044

0.759–1.435

0.7918

Exercise

1

1

−

−

1

−

−

2

0.79

0.587–1.062

0.1187

0.753

0.556–1.02

0.0674

3

1.051

0.694–1.591

0.8142

1.023

0.673–1.554

0.9164

Blood sugar (mg/dl)

 

1.002

0.997–1.006

0.4223

1

0.995–1.005

0.9936

Total Cholesterol (mg/dl)

 

1

0.997–1.004

0.9437

1

0.996–1.003

0.8421

Hemoglobin (g)

 

1.11

1.013–1.216

0.0251*

1.12

0.993–1.262

0.0647

CCI

0

1

−

−

1

−

−

1 ~ 2

1.243

0.912–1.692

0.1681

1.253

0.915–1.716

0.159

 ≥ 3

1.616

1.083–2.412

0.0188*

1.635

1.078–2.481

0.0208*

  1. HR, hazard ratio; CI, confidence interval, PELD, Percutaneous endoscopic lumbar discectomy; BMI, Body mass index; CCI, Charlson comorbidity index.
  2. *Statistically significant.
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