Table 3: The relationship between different continuous variables and average numbers of doctor's visit using univariate and multiple linear regression analyses. Multiple linear regression was adjusted for dampness score, number of windows, time windows were open, and age of house.
Variable	Unadjusted slope	Adjusted slope (95% CI)
Age (yrs)	0.007	0.012 (0.002 to 0.022)
Dampness score	0.015	-0.047 (-0180 to 0.086)
Number of windows	-0.025	-0.094 (-0.231 to 0.042)
Time windows were open (hrs)	0.018	-0.009 (-0.060 to 0.041)
Age of house (yrs)	0.011	0.002 (-0.009 to 0.012)