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Table 4 Distribution of studies by outcome area and comparators used

From: The environmental, socioeconomic, and health impacts of woodfuel value chains in Sub-Saharan Africa: a systematic map

Comparator Total Environmental studies Socio economic studies Health studies
No. % No. % No. % No. %
BACI (before–after and control–impact) 4 3 3 3 4 7 0 0
Before–after 3 2 0 0 0 0 0 0
Control–impact 34 22 26 28 3 5 7 26
Counterfactual 7 5 2 2 4 7 3 11
Multiple cases 25 16 10 11 16 27 1 4
Single case 61 40 38 41 30 50 13 48
Time series 18 12 14 15 3 5 3 11
Total 152   93   60   27