8Dalton P, Macintosh DJ, Pearson B. Variance analysis in clinical pathways for total hip and knee joint arthroplasty[J]. J Qual Clin Pract,2000,20(4) :145 - 149.
9Widjaja LS, Chan BP, Chen H. Variance analysis applied to a strokepathway :How this can improve efficiency of health care delivery[J]. Ann Aead Med Singapore, 2002,31 (4) : 425 - 430.
10Cabello CC. Use of variance outcomes to improve the management of the adult kidney transplant patient[J]. Outcoms Manag Nurs Pract,2001,5(4):153- 160.