The short-term health and psychosocial impacts of domestic energy efficiency investments in low-income areas: a controlled before and after study

Table 2 Health outcomes at baseline and follow-up for the intervention and control group

		Intervention		Control		Effect size		Unadjusted			Adjusted^(a)
Outcome	Scale	Baseline M (SD)	Follow up M (SD)	Baseline M (SD)	Follow up M (SD)	Cohen’s d^(c)	Model^(b)	B	SE	p	B	SE	p
MCS (mental health)	0–100	44.81 (12.56)	45.62 (11.94)	46.02 (12.06)	46.85 (12.36)	0.005	L	−0.059	0.789	0.940	0.003	0.812	1.000
PCS (physical health)	0–100	42.90 (13.94)	43.11 (13.80)	42.25 (14.47)	41.48 (14.24)	0.107	L	0.987	0.664	0.137	0.976	0.669	0.145
Respiratory symptoms	0–11	2.97 (2.74)	2.91 (2.74)	2.94 (2.67)	3.05 (2.77)	0.061	L	−0.155	0.192	0.419	−0.141	0.202	0.485
Asthma symptoms	0–9	2.34 (2.55)	2.20 (2.45)	2.23 (2.50)	2.24 (2.51)	0.051	L	−0.088	0.247	0.722	−0.133	0.253	0.600
Subjective wellbeing	0–10	6.55 (2.50)	6.89 (2.25)	6.96 (2.42)	6.92 (2.42)	0.200	L	0.375	0.134	0.005	0.384	0.134	0.004

Note: ^(a)adjusted for gender, age, housing benefit, income, and smoking status; ^(b)L = linear, O = ordinal, B = binomial; ^(c)Cohen’s d effect sizes: small 0.20, medium 0.50, and large 0.80

ISSN: 1471-2458