Table 2—

Difference in outcome measures at 12-month follow-up, intention-to-treat analysis: control versus intervention

OutcomeAt study entry12 months after interventionDifference (95% CI)
Intervention groupControl groupIntervention groupControl groupUnadjustedAdjusted for baseline score
NHER5.15.55.55.70.2 (-0.5–0.9)0.2 (-0.1–0.6)
EAFC £696533647580-66.9 (-250.2–116.4)-12.1 (-52.4–28.7)
LR h at 21°C55.973.159.464.04.6 (-19.2–28.3)7.4 (-11.0–25.8)
BR h at 18°C100.2109.5111.9102.2-9.7 (-36.4–17.0)22.4 (1.6–43.4)
LR average humidity g·kg−146.460.043.843.0-0.9 (-4.8–3.0)-1.7 (-4.9–1.6)
BR average humidity g·kg−150.065.449.548.7-0.8 (-4.3–2.7)-0.8 (-3.5–1.9)
COPD admissions n1.11.11.51.1-0.4 (-1.2–0.4)0.4 (-0.4–1.1)
Symptom score#73.876.573.277.1-3.8 (-12.4–4.8)-3.5 (-11.3–4.3)
Impact score#56.757.161.058.82.1 (-6.8–11.0)3.0 (-4.3–10.2)
Activities score#85.583.083.582.60.9 (-6.9–8.7)-1.4 (-7.7–4.8)
SGRQ total686869.868.9-0.9 (-8.5–6.6)-0.9, (-6.7–4.9)
VAS score50.347.148.548.50.0 (-1.0–1.0)-0.3 (-1.2–0.6)
  • NHER: National Home Energy Rating; EAFC: estimated annual fuel costs; LR: living room; BR: bedroom; COPD: chronic obstructive pulmonary disease; SGRQ: St George’s Respiratory Questionnaire; VAS: visual analogue scale. #: score from SGRQ; : adjusted for baseline score, age, % predicted forced expiratory volume in 1 s and mass of particles <2.5 μm in diameter.