title: Prospective comparison of three guideline development methods for treatment of actinic keratosis.
abstract: OBJECTIVE
  To compare three methods of guideline development, to see whether using alternative evidence-based methods resulted in variation of recommendations for treating actinic keratosis.
  
  
  METHODS
  Method 1 followed a standard multiple session evidence-based approach with a working group. In method 2 recommendations were formulated by a working group during a 2-day conference. Method 3 used one epidemiologist to summarise the evidence and one dermatologist to make clinical recommendations afterwards. Graded recommendations and levels of evidence were compared per therapy across three draft guidelines. The primary outcome was the extent of accordance or discordance. Secondary outcomes were total costs and time period necessary to make a draft guideline.
  
  
  RESULTS
  Therapeutic recommendations and levels of evidence differed in some occasions. However, intraclass correlations between levels of evidence were significant (method 1 vs 2: p = 0.003; method 1 vs 3: p < 0.001). Regarding recommendation variation method 1 and method 2 correlated significant at 0.755 (p = 0.001). Method 1 versus 3 and method 2 versus 3 also showed significant, but lower, correlation coefficients (respectively, 0.493 (p = 0.026) and 0.673 (p = 0.007)). Method 3 was the cheapest and quickest (24,770 euro and 4 months) and method 1 was the most expensive and slowest method (€48,100 euro and 14 months).
  
  
  CONCLUSIONS
  The value of a guideline using alternative evidence-based methods seems to at least equal that of a guideline composed in multiple sessions, that is, for topics with a monodisciplinary character and a relatively small number of conducted trials. In addition, the presented alternatives were more time- and cost-efficient.
authors: Dutch Society of Dermatology and Venereology, Domus Medica, room 5C-23, PO Box 8552, 3503 RN Utrecht, The Netherlands. r.borgonjen@nvdv.nl
authors: Rinke J
authors: RJ
authors: Borgonjen
authors: Jannes J
authors: JJ
authors: van Everdingen
authors: Cathelijne M
authors: CM
authors: Bik
authors: Mariska K
authors: MK
authors: Tuut
authors: Phyllis I
authors: PI
authors: Spuls
authors: Peter C
authors: PC
authors: van de Kerkhof