• 1
    Statistical Bulletin: Cervical Screening Programme. England: 1998–99. Department of Health, 1999.
  • 2
    Flannelly G, Anderson D, Kitchener HC, et al. Management of women with mild and moderate cervical dyskaryosis. BMJ 1994;308: 13991403.
  • 3
    Shafi MI, Luesley DM, Jordan JA, Dunn JA, Rollason TP, Yates M. Randomised trial of immediate versus deferred treatment strategies for the management of minor cervical cytological abnormalities. Br J Obstet Gynaecol 1997;104: 590594.
  • 4
    Flannelly G. Immediate colposcopy or cytological surveillance for women with mild dyskaryosis: a cost effectiveness analysis. J Publ Health Med 1997;19(4): 419423.
  • 5
    Wardle J, Pernet A, Stephens D. Psychological consequences of positive results in cervical cancer screening. Psychol Health 1995;10(3): 185194.
  • 6
    Bell S, Porter M, Kitchener H, et al. Psychological response to cervical screening. Prev Med 1995;24(6): 610616.
  • 7
    Brewin CR, Bradley C. Patient preferences and randomised clinical trials. BMJ 1989;299: 313315.
  • 8
    Zelen M. A new design for randomized clinical trials. N Engl J Med 1979;300(2): 12421245.
  • 9
    Bridges KW, Goldberg DP. The validation of the GHQ-28 and the use of the MMSE in neurological in-patients. Br J Psychiatry 1986;148: 548553.
  • 10
    Spielberger CD. Manual for the State Trait Anxiety Inventory (Form Y)Palo Alto, CA: Consulting Psychologists Press, 1983.
  • 11
    Torgerson DJ. Contamination in trials: is cluster randomisation the answer?. BMJ 2001;322(7282): 355357.
  • 12
    Everitt B, Pickles A. Statistical Aspects of the Design and Analysis of Clinical Trials. London: Imperial Collage Press, 2000.