Net health benefits at a threshold of £30,000 per QALY were 3.2 (−11.1 to 16.9) QALYs per 1,000 participants with 5 years intervention (probability cost-effective 64.7 %) and 5.0 (−9.5 to 19.3) with 10 years intervention (probability cost-effective 72.4 %).
In veterinary medicine valid data is lacking so that it is not possible to reliably conclude about pre-intervention probability.
This suggestion considers the pre-intervention probability for therapeutic success, which for instance can be significantly reduced in patients with a history of multiple failed therapeutic trials.
The second element in each of the terms in parentheses, which is a counterfactual, can be expressed as: the number of flu cases avoided in the physician's office due to the intervention = number of patients visiting the physician's office* (probability of contracting influenza in that office without the intervention – probability of contracting influenza in that office with the intervention).
Huang and Valtorta (2006) and Shpitser and Pearl (2006) have independently proven this calculus to be complete, so that it characterizes all of the post-intervention probabilities that can be expressed in terms of simple conditional probabilities.
For any public health intervention, probabilities of benefits and risks must be balanced.
The validity of the point estimate is unlikely to be impaired by the absence of pre-intervention data as the audited pre-intervention probabilities of referral were similar in the intervention and control groups.
For those completing the intervention, the probability of conduct disorder persisting is reduced in line with our estimate of intervention effectiveness by age 6, but this effect is not sustained for a proportion of completers by age 7 (recidivism).
The purposive limits on responsibility have therefore either to be regarded as additional to those (later intervention, heightened probability) proposed by those who reject causal minimalism, or as replacing them.
Since the DIS technology by its nature offers the earliest possible moment of intervention, the probability of saving the menisci is much higher than with the other treatment strategies and consequently a lesser number of patients are likely to develop osteoarthrosis in the long term.
