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Table 2 Five criteria used in quality assessment (61 studies)

From: China’s conversion of cropland to forest program: a systematic review of the environmental and socioeconomic effects

Quality criterion Definition Percentage of all papers meeting criteria (%)
1 Data collection methods are thoroughly explained, clear and replicable 68.9 (42 papers)
2 Sample size is well explained and representative of the population 54.1 (33 papers)
3 Qualitative or quantitative analysis methods are thoroughly explained, clear and replicable; key terms and variables are well defined 70.5 (43 papers)
4 Results/conclusions are logically derived and supported by presented evidence 80.3 (49 papers)
5 Confounding factors are considered and well explained 54.1 (33 papers)