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. 2011 Sep 27;12(4):185–192. doi: 10.1007/s10195-011-0158-7

Table 3.

Perioperative data comparisons between groups

Characteristics Group A (N = 19) Group B (N = 19) P valueψ
Mean ± SD (range) Mean ± SD (range)
Duration of surgery (min) 68.1 ± 10.9 (54–92) 44.1 ± 9.1 (28–64) 0.0001
Mean wound size (cm) 8.5 ± 1.6 (6–11) 4.3 ± 0.8 (3–6) 0.0001
Average blood loss (ml) 144.3 ± 31.5 (89–195) 65.4 ± 28 (27–100) 0.0001
Mean hospital stay (days) 2.3 ± 0.8 (1–4) 1.4 ± 0.5 (1–2) 0.0007

SD standard deviation, ψ unpaired nonparametric Mann–Whitney test