Statistical analysis
Statistical analyses were performed using SPSS 18.0 for Windows (SPSS
Inc., Chicago, IL, USA). Data are presented as the mean ± standard
deviation, number, or percentage. Data are presented as the mean ±
standard deviation. Student’s t test was used to compare continuous
variables (age, height, weight, BMI, EBV, TBL, Hbloss,
VBL, IBL, post-operative drainage, PBL, HBL, and HBL as a % of true
TBL). Multiple linear regression analysis was performed to identify risk
factors involved in the HBL including six qualitative variables (volume
of the largest removed leiomyoma, number of removed leiomyomas,
types of largest removed leiomyoma
in the uterus, cell types of
largest removed leiomyoma in the uterus, degeneration of largest removed
leiomyoma in uterus and location of largest removed leiomyoma in the
uterus) and seven quantitative variables (age, BMI, surgical time,
intro-operative blood loss, the use of pituitrin, pre-operative value of
Hb and pre-operative value of Hct ). Statistical significance was set
prior to data collection at p < 0.05.