What is needed, then, are representative and international comparative studies with a high degree of generalizability.
The Kenyan program is similar in design to most other major national cash transfer programs in Eastern and Southern Africa, suggesting a degree of generalizability of the results reported here.
Non-randomized studies did not have significantly longer follow-up periods, three included an analysis of prognostic variables, only one reported on adverse effects, and the degree of generalizability was unclear.
This gives the study a high degree of generalizability.
Alternatively inclusion criteria may be narrowed, with a corresponding lower degree of generalizability as a consequence.
Another reason stems from an effort to achieve a degree of generalizability (Fisher, 1966).
Given the study sites were representative of the respective country allows for a higher degree of generalizability of the findings.
As a large multicenter cohort representing over 60 US hospitals, it has a high degree of generalizability.
From this standpoint, study heterogeneity can be a strength, as it allows to quantify the degree of generalizability of results, and to investigate the sources of the heterogeneity.
The study period was long, allowing the capture of data from many different clinicians (junior and senior), which suggests a degree of generalizability.
