Table 2 Comparisons between the No reoperation and reoperation groups.

Sex

Male

2623

453 (14.7%)

Female

2846

378 (11.7%)

Diagnosis

Lumbar disc herniation

1516

223 (12.8%)

Lumbar spinal stenosis without spondylolisthesis

440

26 (5.6%)

Lumbar spinal stenosis with spondylolisthesis

3291

549 (14.3%)

Lumbar spondylolysis

222

33 (12.9%)

Surgical method

Open discectomy

2323

373 (13.8%)

PELD

188

54 (22.3%)

Fusion

2163

270 (11.1%)

Laminectomy

795

134 (14.4%)

Age, years

40 ~ 49

804

104 (11.5%)

50 ~ 59

1771

236 (11.8%)

60 ~ 69

1921

351 (15.5%)

70 ~ 79

914

133 (12.7%)

80 ~ 

59

7 (10.6%)

Residence

Seoul

812

128

Pusan

312

44

Daegu

218

30

Incheon

292

38

Gwangju

179

25

Daejeon

187

37

Ulsan

143

18

Gyeonggi-do

1053

159

Gangwon-do

204

40

Chungbuk-do

204

33

Chungnam-do

369

51

Jeonbuk-do

312

59

Jeonnam-do

377

43

Gyeongbuk-do

380

61

Gyeongnam-do

372

61

Jeju-do

55

4

Insuracne eligibility

1

1078

176

2

757

104

5

1047

164

6

2466

368

7

94

17

8

27

2

Health insurance premium

Medical benefit

121

19

1

344

48

2

314

51

3

340

44

4

412

67

5

422

58

6

540

85

7

548

97

8

625

102

9

857

124

10

946

136

BMI, kg/m²

 < 20

306

39 (11.3%)

20 <  < 25

2892

428 (12.9%)

25 < 

2271

364 (13.8%)

Smoking

Yes

982

176

No

4487

655

Alcohol drinking

Yes

1871

323

No

3598

508

Exercise

1

3250

487

2

1616

230

3

603

114

CCI

0

1459

191

1–2

2827

431

 ≥ 3

1183

209

Blood sugar

100.57 ± 30.60

99.96 ± 29.29

Total cholesterol

202.29 ± 38.42

201.27 ± 36.27

Hemoglobin

13.76 ± 1.44

13.90 ± 1.42