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Table 2 Estimates of relative frequencies of projects completed by 2006 and 2007 for different classifications, respectively

From: An assessment of health research impact in Iran

The classification proposed by Europe’s OECD

Experimental developmental

Applied

Basic

10.8% (0.03)

80.2% (0.04)

9% (0.01)

The classification proposed by the Australian national health and medical research council

Public health

Clinical research

Health services research

Strategic basic research

Pure basic research

9% (0.01)

29.3% (0.02)

11.5% (0.02)

44.1% (0.03)

6% (0.01)

Classification based on method of study

Descriptive observational

Analytical observational

Interventional

Systematic review

Diagnostic value of tests

Laboratory studies

Design and production of equipment, software, medicines or chemical substances

Others

22.5% (0.03)

34.8% (0.02)

15.0% (0.02)

1% (0.01)

2.4% (0.01)

15.6% (0.02)

4.3% (0.02)

4.7% (0.02)