Analysis Plan
QUIT Service Evaluation: Statistical and Health Economic Analysis Plan
This document details the proposed statistical and health economic analyses for the QUIT hospital-based stop smoking service. It focuses on the acute inpatient setting and additional analysis plans for other settings will be developed from this.
The document is divided into two sections:
Statistical Analysis Plan
The aim of the analysis plan is to support the improvement process of the QUIT service by gaining insights from quantitative service data. Since the service is new, the amount and quality of the quantitative data from the service that is available for analysis might be limited until the service has had more time to embed. The analyses will therefore be conducted from the point of view of producing insights to support service improvement rather than giving an ultimate verdict on service effectiveness.
The plan includes information about:
the aims of the analysis
the acute inpatient pathway
defining and quantifying outcomes
dataset design
analysis populations
sample sizes and completeness
descriptive analysis
statistical analysis of variation in the achievement of 4-week quits
Health Economic Analysis Plan
The health economic analysis plan aims to support the improvement process of the QUIT service by using quantitative service data and data on the costs of service implementation to estimate a monthly trajectory of the return-on-investment in terms of the cost per 4-week quit.
Since the service is new, the expectation is that the cost per 4-week quit will change rapidly over time. A decreasing cost per quit would indicate greater value for money by virtue of having lower running costs or a higher number of quits.
The health economic analyses will therefore be conducted from the point of view of producing insights into the factors that underpin the cost per quit to support service improvement, rather than giving an ultimate verdict on service return-on-investment.
The plan includes information about:
the aims of the analysis
the approach to costing the service
the sunk costs of service set-up
staff costs and non-staff costs
pharmacotherapy costs
return-on-investment
View: Statistical and Health Economic Analysis Plan for the QUIT hospital-based smoking cessation service (hosted on FigShare)
