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Table 1 Socio-demographic and building characteristics of the intervention and control groups of the study cohort

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

Characteristics Category Intervention
% (n)
Control
% (n)
Socio-demographic characteristics
 Gender Male 41.2 (145/352) 40.3 (166/412)
Female 58.8 (207/352) 59.7 (246/412)
 Age (years) Under 25 1.4 (5/362) 2.1 (9/414)
26–35 6.9 (25/362) 6.0 (25/414)
36–45 10.8 (39/362) 9.4 (39/414)
46–54 14.1 (51/362) 11.1 (47/414)
55–64 30.1 (109/362) 25.1 (104/414)
65 or above 36.7 (133/362) 45.9 (190/414)
 Household composition Households with no children 79.1 (284/359) 83.1 (339/415)
Households with children 20.9 (75/359) 16.9 (76/415)
 Marital status Single 13.8 (50/363) 11.3 (47/412)
Married/cohabiting 55.1 (200/363) 51.6 (214/412)
Separated/divorced 16.0 (58/363) 21.7 (90/412)
Widowed 14.9 (54/363) 15.2 (63/412)
 Household income £0-4,999 3.5 (12/339) 3.6 (14/392)
£5,000-9,999 23.5 (80/339) 25.8 (101/392)
£10,000-19,999 33.9 (115/339) 35.9 (141/392)
£20,000-29,999 18.0 (61/339) 15.3 (60/392)
£30,000 or higher 20.6 (70/339) 19.4 (76/392)
 Housing benefits Yes 25.1 (89/354) 24.4 (98/402)
No 7.9 (265/354) 75.6 (304/402)
 Tenure Owner occupied 77.5 (276/356) 74.0 (307/415)
Private rental 3.9 (14/356) 6.7 (28/415)
Local authority rental 13.8 (49/356) 13.3 (55/415)
Housing association rental 3.4 (12/356) 5.3 (22/415)
 Time lived at current address Less than one year 3.3 (12/360) 4.3 (18/416)
1–4 years 9.4 (34/360) 11.8 (49/416)
5–9 years 14.4 (52/360) 12.7 (53/416)
More than 9 years 72.8 (262/360) 71.2 (296/416)
Building characteristics
 Building type Detached house 12.5 (45/360) 12.3 (51/416)
Semi-detached house 38.1 (137/360) 28.8 (120/416)
Terraced house 41.1 (148/360) 46.9 (195/416)
Bungalow 5.0 (18/360) 5.3 (22/416)
Flat 1.4 (5/360) 6.0 (25/416)
 Building age Before 1919 44.1 (152/345) 40.7 (166/405)
1919–1945 26.1 (90/345) 24.3 (99/405)
1945–1965 17.4 (60/345) 23.5 (96/405)
1965–1979 7.5 (26/345) 6.1 (25/405)
1980 or later 4.9 (17/345) 5.4 (22/405)
 Number of bedrooms One 1.7 (6/358) 5.4 (22/409)
Two 19.8 (71/358) 20.8 (85/409)
Three 68.2 (244/358) 65.3 (267/409)
Four or more 10.4 (37/358) 8.5 (35/409)
 Arbed energy efficiency measures External wall insulation 71.7 (261/364) ---
Full central heating 39.0 (138/354) ---
Voltage Optimiser 44.4 (159/358) ---
Heating control 28.6 (101/353) ---
Connection to mains gas 13.9 (49/353) ---
  1. Note: Denominators vary due to missing data