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Table 1 Comparisons of basic characteristics of patients between ASD and non-ASD group

From: Relationship between postoperative lordosis distribution index and adjacent segment disease following L4-S1 posterior lumbar interbody fusion

 Total (n = 200)Non-ASDASDP
Age, years64.8 ± 8.564.7 ± 8.766.1 ± 5.10.315
Sex, n (%)   0.773
 Male89 (44.5)82 (44.8)7 (41.2) 
 Female111 (55.5)101 (55.2)10 (58.8) 
BMI24.14 ± 3.4223.87 ± 3.3327.04 ± 3.00< 0.001
BMI group, n (%)   0.001
BMI < 25 kg/m2121 (60.5)117 (63.9)4 (23.5) 
BMI ≥ 25 kg/m279 (39.5)66 (36.1)13 (76.5) 
Comorbidities, n (%)
 Hypertension131 (65.5)119 (65.0)12 (70.6)0.645
 Diabetes Mellitus57 (28.5)51 (27.9)6 (35.3)0.713
 Coronary artery disease97 (48.5)90 (49.2)7 (41.2)0.528
 COPD39 (19.5)34 (18.6)5 (29.4)0.448
Hospital stay (days)9.0 (7.0~11.0)9.0 (7.0~11.0)8.0 (6.0~11.5)0.757
Follow-up period (months)84.0 (70.0~98.0)85.0 (72.0~99.0)62.8 ± 24.6< 0.001
Intraoperative blood loss (ml)290 (220~380)290 (220~380)294.7 ± 111.00.920
Operation time (hours)4.45 (3.70~5.30)4.50 (3.70~5.30)4.35 ± 0.870.525
  1. Mann-Whitney U test, Pearson χ2 test, independent-samples t test
  2. ASD adjacent segment disease, BMI body mass index, COPD chronic obstructive pulmonary disease