Correlation between patients’ reasons for encounters/health problems and population density in Japan: a systematic review of observational studies coded by the International Classification of Health Problems in Primary Care (ICHPPC) and the International Classification of Primary care (ICPC)

Table 1 Inclusion criteria

Study design	Observational study
Date of publication	Until March 31, 2015
Setting	Japan
	Clinic only (Hospital were excluded)
Methods	Coding RFEs or health problems using ICHPPC, ICHPPC-2,
	ICHPPC-2-Defined, ICPC and ICPC-2
Results	Frequency of RFEs and health problems

ISSN: 2731-4553