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Table 1 Baseline characteristics

From: Intraoperative anti-inflammatory drugs combined with no drainage after MIS-TLIF in the treatment of recurrent lumbar disc herniation: an RCT

Parameter Intervention group Control group P value
Number of patients 63 65  
Male patients, number (%) 36(57.1) 34 (52.3) 0.771
Age, years 52.3 ± 4.3 53.0 ± 4.4 0.580
BMI, kg/m2 24.1 ± 2.0 24.4 ± 2.3 0.632
Symptom duration, months 4.9 ± 8.5 4.5 ± 9.1 0.876
Surgical time, minutes 184 ± 22 179 ± 22 0.435
Intraoperative blood loss 127 ± 35 121 ± 38 0.572
Number of herniation levels
 L3–L4, n 2 3 0.149
 L4–L5, n 28 32  
 L5–S1, n 33 30