Table 2.

Correlations.^a

	Non-depressed			Depressed
	n	r0	95% confidence limits	n	r	95% confidence limits	Z	Sig of the difference in r0 and r (two-tailed)
Correlation mean low mood and high mood	59	−0.01	−0.27–0.25	78	0.38b	0.17–0.55	−2.3	0.02
Correlation mean square successive difference (MSSD) (mood instability) low mood and MSSD high mood	59	0.31a	0.06–0.53	78	0.61a	0.45–0.73	−2.18	0.03

^aCorrelations between mean low and mean high moods for the non-depressed and depressed groups and MSSD low and MSSD high moods for the non-depressed and depressed groups.

^bCorrelation is significant at the 0.05 level (two-tailed).