A high level of detail in reporting of resource use has to be aimed for as well as exact description of the valuation methods.
Fortunately, the problem of price variation across settings is the easiest to handle methodologically, through the separate reporting of resource use and unit costs [ 46, 47].
These include reporting of resource used, sensitivity analysis, presentation of study's results with ICER, both internal and external validation of decision analytic models, transparency on source of funding, etc.
Access to claims data may also eliminate some issues with proxy reporting of resource utilization, such as unawareness of care use or a too-long recall period [ 7, 8].
Trotter and Worcester's [ 44] study reported lack of resources and patient materials, clinician doubts regarding being effective, lack of confidence to tackle the issues and support patients to quit smoking and insufficient time as barriers to perform preventive activities.
The effects of nurse-led care on QoL and costs were difficult to interpret due to heterogeneous outcome reporting, valuation of resources and the small number of studies.
First, cost analysis was not calculated using direct cost measurement but on patient self-reporting of resource utilization on the HAPSQ.
Another limitation is that cost analysis was not based on direct cost measurement but on patient self-reporting of resource utilisation, which can be affected by recall bias.
Like most depression cost analyses conducted outside the United States [ 3], our study was based on patient self-reporting of resource use.
