Table 2

Outcome measuresSubjectsRoman and Tabsh [17]Brown et al. [25]Hassiakos et al. [38]Kwawukume [1]Kaymak [39]

Cases11116471240
Controls25716941280

Blood lossCases12.6%495 mLs (200–1000)12.5%
Controls12.8%355 mLs (150–900)11.3%
P value0.95 (NS) NS NS NS

Change in Hb/PCVCasesMean = 5.5%1.7 g/dlMean = 1.83 g/dl
ControlsMean = 6.1%1.4 g/dlMean = 1.73 g/dl
P valueNS NS NS NS

Blood transfusionCases1/111NILNIL
Controls3/257NILNIL
P valueNS NS NS

Mean operating time (mins)Cases55NA15 mins longer than control62.08NA
Controls51NA50.83NA
P valueNS NA NS NS NA

Postoperative feverCases4.5%NANA
Controls4.7%NANA
P valueNS NS NA NA NS

Hospital stay (days)CasesMean = 3.65 days
ControlsMean = 3.45 days
P valueNS NS NS

mLs: milliliters; NS: not significant (P > 0.05); Hb: haemoglobin concentration; PCV: packed cell volume; g/dl: grammes per deciliter; mins: minutes; NA: not assessed.