Table 4—

Difference in outcome measures at 12-month follow-up, action versus no action

OutcomeBefore action12 months after actionDifference (95% CI)
Action groupNo action groupAction groupNo action groupUnadjustedAdjusted for baseline score
National Home Energy Rating4.85.66.05.70.3 (-0.3-0.9)1.1 (0.8-1.4)
Estimated annual fuel costs £705557612576-36.5 (-105.7-81.8)-65.3 (-31.9- -98.7)
LR h at 21°C47.969.054.169.215.2 (-6.1-36.4)1.9 (-15.0-18.8)
BR h at 18°C104.5114.8110.5112.01.5 (-21.1-24.0)0.8 (-22.8-21.3)
LR average humidity g·kg−146.651.844.743.6-1.1 (-4.4-2.2)0.4 (-2.4-3.2)
BR average humidity g·kg−149.556.249.748.2-1.4 (-4.5-1.6)-0.6 (-2.9-1.7)
COPD admissions0.91.20.81.40.5 (-0.2-1.2)-0.3 (-0.9-0.4)
SGRQ symptom score72.477.066.077.7-11.7 (-19.2- -4.1,)-9.0 (-2.5- -15.5)#
SGRQ impact score58.355.458.859.60.9 (-7.2-8.9)-5.7 (-12.3-0.8) #
SGRQ activities score86.382.483.283.80.6 (-6.8-8.0)-3.9 (-9.3-1.5) #
SGRQ total68.86767.469.9-2.5 (-9.2-4.2,)-5.7 (-0.7- -10.7)
VAS score46.149.246.947.80.08 (-0.76-0.92)0.1 (-0.8-0.9) #
  • LR: living room; BR: bedroom; COPD: chronic obstructive pulmonary disease; SGRQ: St George’s Respiratory Questionnaire; VAS: visual analogue scale. #: adjusted for baseline score, age, % predicted forced expiratory volume in 1 s and mass of particles <2.5 μm in diameter.