. Author manuscript; available in PMC: 2015 Sep 1.

Published in final edited form as: Air Qual Atmos Health. 2014 Feb 22;7(3):357–367. doi: 10.1007/s11869-014-0244-0

Table 6.

Change in rMSSD associated with each quartile of mean temperature in the previous 6 hours (summer) or previous 3 weeks (winter).

	Quartile	Minimum (°C)	Median (°C)	Maximum (°C)	Change in rMSSD (ms)	95% CI	Test for trend p-value
SUMMER (6 hours)	1^st Quartile	8.00	17.04	18.42	0.00	--	0.0002
	2^nd Quartile	18.43	20.20	21.88	−5.10	−12.91, 2.70
	3^rd Quartile	21.96	23.45	25.26	−13.70	−22.22, −5.17
	4^th Quartile	25.34	27.54	34.75	−17.52	−27.81, −7.23

WINTER (3 weeks)	1^st Quartile	−7.52	−6.09	−2.43	0.00	--	0.14
	2^nd Quartile	−2.39	−1.50	−0.63	3.51	−6.91, 13.93
	3^rd Quartile	−0.62	0.17	1.97	8.32	−3.99, 20.64
	4^th Quartile	1.98	4.81	7.41	9.46	−4.94, 23.86