As with any system financing health care, the NHS has a limited budget and a vast number of potential spending options. Choices must be made as to how this limited budget is spent.
Economic evaluations are carried out within a
health technology assessment framework to compare the cost-effectiveness of alternative activities and to consider the
opportunity cost associated with their decisions. By choosing to spend the finite NHS budget upon those treatment options that provide the most efficient results, society can ensure it does not lose out on possible health gains through spending on inefficient treatments and neglecting those that are more efficient. NICE attempts to assess the cost–effectiveness of potential expenditures within the NHS to assess whether or not they represent 'better value' for money than treatments that would be neglected if the expenditure took place. It assesses the cost–effectiveness of new treatments by analysing the cost and benefit of the proposed treatment relative to the next best treatment that is currently in use.
Quality-adjusted life years NICE guidance supports the use of
quality-adjusted life years (QALY) as the primary outcome for quantifying the expected health benefits associated with a given treatment regime. By comparing the present value (see
discounting) of expected QALY flows with and without treatment, or relative to another treatment, the net/relative health benefit derived from such a treatment can be derived. When combined with the relative cost of treatment, this information can be used to estimate an
incremental cost-effectiveness ratio (ICER), which is considered in relation to NICE's threshold willingness-to-pay value. Over the years, there has been great controversy as to what value this threshold should be set at. Initially, there was no fixed number. But the appraisal teams created a consensus amount of about £30,000. However, in November 2008
Alan Johnson, the then Secretary of State, announced that for end-of-life cancer drugs the threshold could be increased above £30,000. The first drug to go through the new process was
lenalidomide, whose ICER was £43,800.
Cost per quality-adjusted life year gained The following example from NICE explains the QALY principle and the application of the cost per QALY calculation. A patient has a life-threatening condition and is expected to live on average for one year receiving the current best treatment which costs the NHS £3,000. A new drug becomes available that will extend the life of the patient by three months and improve his or her quality of life, but the new treatment will cost the NHS more than three times as much at £10,000. Patients score their perceived quality of life on a scale from 0 to 1 with 0 being worst possible health and 1 being best possible health. On the standard treatment, quality of life is rated with a score of 0.4 but it improves to 0.6 with the new treatment. Patients on the new treatment on average live an extra 3 months, so 1.25 years in total. The quality of life gained is the product of
life span and
quality rating with the new treatment less the same calculation for the old treatment, i.e. (1.25 x 0.6) less (1.0 x 0.4) = 0.35 QALY. The marginal cost of the new treatment to deliver this extra gain is £7,000 so the cost per quality life year gained is £7000/0.35 or £20,000. This is within the £20,000-£30,000 that is suggested by NICE to be the limit for drugs to be cost-effective. If the patient was expected to live only one month extra and instead of three then NICE would issue a recommendation not to fund. The patient's
primary care trust could still decide to fund the new treatment, but if not, the patient would then have two choices. He or she could opt to take the free NHS standard treatment, or he or she may decide to pay out of pocket to obtain the benefit of the new treatment from a different health care provider. If the person has a private health insurance policy the person could check to see whether the private insurance provider will fund the new treatment. About 8% of the population has some private health insurance from an employer or trade association and 2% pay from their own resources.
Basis of recommendations Theoretically, it might be possible to draw up a table of all possible treatments sorted by cost per QALY gained. Those treatments with lowest cost per QALY gained would appear at the top of the table and deliver the most benefit per value spent and would be easiest to justify funding for. Those where the delivered benefit is low and the cost is high would appear at the bottom of the list. Decision makers would, theoretically, work down the table, adopting services that are the most cost effective. The point at which the NHS budget is exhausted would reveal the
shadow price, the threshold lying between the CQG (cost per QALY gained) of the last service that is funded and that of the next most cost effective service that is not funded. In practice this exercise is not done, but an assumed shadow price has been used by NICE for many years in its assessments to determine which treatments the NHS should and should not fund. NICE states that for drugs the CQG should not normally exceed £30,000 but that there is not a hard threshold, though research has shown that any threshold is "somewhat higher" than being in the range £35,000 - £40,000. The
House of Commons Health Select Committee, in its report on NICE, stated in 2008 that "the ... cost-per-QALY it uses to decide whether a treatment is cost-effective is of serious concern. The threshold it employs is not based on empirical research and is not directly related to the NHS budget, nor is it at the same level as that used by
primary care trusts (PCTs) in providing treatments not assessed by NICE, which tends to be lower. Some witnesses, including patient organisations and pharmaceutical companies, thought NICE should be more generous in the cost per QALY threshold it uses, and should approve more products. On the other hand, some PCTs struggle to implement NICE guidance at the current threshold and other witnesses argued that a lower level should be used. However, there are many uncertainties about the thresholds used by PCTs." It went on to recommend that "an independent body should determine the threshold used when making judgements of the value of drugs to the NHS." ==Criticism==