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Table 1 Demographic data and clinical baseline characteristics between the two groups

From: Learning curve of trans-sacral epiduroscopic laser decompression in herniated lumbar disc disease

 

Early group

(n = 20)

Late group

(n = 62)

OR or difference

95% CI

P value

Age

41.15 ± 15.44

40.43 ± 15.43

− 0.72 ± 4.82

− 9.030–10.480

0.882†

Male ratio

14 (70.0%)

38 (61.3%)

1.750

0.482–6.351

0.520‡

Smoking status

7 (35.0%)

19 (30.6%)

0.743

0.199–2.779

0.658‡

Alcohol consumption (g/week)

0.42 (95% CI 0.08–0.76)

0.43 (95% CI 0.097–0.761)

0.01 ± 0.23

− 0.469–0.452

0.820§

Height (cm)

170.67 ± 11.37

168.32 ± 9.17

2.35 ± 3.22

− 4.163–8.885

0.470†

Weight (kg)

68.92 ± 15.86

70.04 ± 11.81

1.12 ± 4.35

− 9.926–7.680

0.798†

Body mass index (kg/m2)

23.46 ± 3.72

24.79 ± 4.22

1.33 ± 1.25

− 3.847–1.191

0.293†

Diabetes

1 (5.0%)

5 (8.1%)

2.000

0.617–23.960

0.578‡

Hypertension

3 (15.0%)

15 (24.2%)

2.267

0.481–10.680

0.294‡

Previous block

9 (45.0%)

39 (62.9%)

3.056

0.838–11.136

0.086‡

Trauma history

3 (15.0%)

9 (14.5%)

0.944

0.167–5.339

0.948‡

Symptom duration (weeks)

3.87 (95% CI 1.84–5.90)

1.63 (95% CI 0.67–2.60)

2.24 ± 1.06

0.949–4.378

0.092§

Dominant symptom, back pain/leg pain

8/12

18/44

2.133

0.556–8.187

0.265‡

  1. CI confidence interval, OR odds ratio
  2. †Independent t-test, ‡Pearson’s Chi square test, §Mann–Whitney U test