Fig. 5

Correlations with score changes and ΔT changes. Score change = week 4-baseline;ΔT change = week 4-baseline; ΔT: temperature difference; a Correlations in Group A; b Correlations in Group B; Spearman’s correlation was calculated and displayed as corrplot graphs using R package “corrplot”. r ranges between − 1 and 1, where − 1 ≤ r < 0 means negative correlation, r = 0 means no correlation, and 0 < r ≤ 1 means positive correlation. Blue circles represent positive correlation and red circles represent negative correlation. The darker the color and the larger the circle, the stronger is the correlation