Table 4.

Sensitivity analysis of total service cost in 6-month period

Sensitivity analysis	Cost varied	Cost of service during audit period (£)
Base case cost (100 % consultant appointments, 100 % face to face appointments, cost of test £540, London weighting)		387,409
Removal of London weighting		377,801
Varying test cost	Test at £300	375,169
	Test at £400	380,269
	Test at £600	390,469
	Test at £700	395,569
	Test at £1000	410,869
Varying proportion of consultant appointments	25 % consultant, 75 % genetic counsellor appointments	377,594
	50 % consultant, 50 % genetic counsellor appointments	380,866
	75 % consultant, 25 % genetic counsellor appointments	384,137
Varying proportion of clinic appointments	25 % telephone, 75 % clinic appointments	383,903
	50 % telephone, 50 % clinic appointments	380,396
	75 % telephone, 25 % clinic appointments	376,890