Association between weather and utilisation of physical therapy in patients with osteoarthritis: a case-crossover study

Table 3 Correlation coefficients between meteorological factors

	Mean temperature	Daily highest temperature	Daily minimum temperature	Diurnal temperature range	Relative humidity	Barometric pressure	Daily precipitation
Mean temperature	1	0.88**	0.94**	0.23**	-0.25**	-0.13**	0.45**
Daily highest temperature	0.88**	1	0.82**	0.32**	-0.15**	-0.27**	0.47**
Daily minimum temperature	0.94**	0.82**	1	0.25**	-0.23**	-0.24**	0.43**
Diurnal temperature range	0.23**	0.32**	0.25**	1	-0.37**	-0.07**	0.03**
Relative humidity	-0.25**	-0.15**	-0.23**	-0.37**	1	-0.28**	0.26**
Barometric pressure	-0.13**	-0.27**	-0.24**	-0.07**	-0.28**	1	-0.31**
Daily precipitation	0.45**	0.47**	0.43**	0.03**	0.26**	-0.31**	1

ISSN: 1471-2474