I'm conducting a systematic review where I specified that I'll be taking studies from LMICs (Low-Middle income countries). During search, I came across a study which was conducted in high income country but the sample was from low income families, would this study be an eligible study?, please answer considering my LMICs criteria. I know superficially it seems that the study needs to be discarded but please think in terms of heterogeneity that we (explicitly or implicitly) assumed that heterogeneity will be coming from socio-economic status more so if a study already uses it, what is the issue in taking it.
I hope, I'm able to explain my query.
Those studies from High Income Countries meet your exclusion criteria, please exclude. @hashim
By the information you provide, it gives me the impression that you are interested in information about "families' income in Low-Middle income countries". If so, you should discard that study because, since the sample comes from a High income country, it is certainly not meeting your inclusion criteria (independently if the sample was low income families).
You can have high income families from LMIC what will you do than? whole data is messed up then. We generalize in this case according to our IN-EX criteria. Mohammad Hashim
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