(a)

Variable	Biogas farms		Referent farms
	n = 31		n = 31
Sociodemographic characteristics	Percent (%)	Number	Percent (%)	Number
Currently pregnant	0	0	6	2
Employed off the farm	39	12	35	11
Currently married	74	23	84	26
Husband employed off the farm	74§	17§	50±	13±
Current smoker	0	0	0	0
Highest level of education attained
None	6	2	10	3
Standard 4	13	4	6	2
Standard 8	48	15	61	19
Form 4	19	6	19	6
Technical college	13	4	3	1
Monthly income from selling milk
<5000 KSH	61	19	68	21
5000–10 000 KSH	32	10	23	7
>10 000 KSH	6	2	10	3

No differences exist between the groups at significance of P ≤ 0.05.

^§based on n = 23 husbands; ^±based on n = 26 husbands.

KSH: Kenyan shilling.