Cross-sectional correlations between the scales of the present study and those reported in the literature.

Table 5: Cross-sectional correlations between the scales of the present study and those reported in the literature.

	Depression						Anxiety
	MPI Neg. Mood	HADS Depression	SCL-90R Depression	BDI-II	CES-D	MHI	HADS Anxiety	SCL-90R Anxiety	STAI
SF-36 Mental Health	0.768¹ (0.698, 0.823) 0.741² (0.681, 0.792) 0.676³ (0.564, 0.764) 0.741⁴ (0.652, 0.809)	0.736¹ (0.659, 0.797) 0.735³ (0.640, 0.809)	0.80¹³ 0.734² (0.672, 0.786) 0.740⁴ (0.651, 0.809)	0-57-0.77¹²		0.96¹¹	0.735¹ (0.658, 0.797) 0.729³ (0.631, 0.804)	0.80¹³ 0.653² (0.577, 0.718) 0.676⁴ (0.571, 0.759)
MPI Negative mood		0.632¹ (0.533, 0.714) 0.596³ (0.466, 0.701)	0.665² (0.591, 0.728) 0.715⁴ (0.620, 0.790)				0.700¹ (0.615, 0.769) 0.615³ (0.488, 0.716)	0.568² (0.479, 0.646) 0.589⁴ (0.464, 0.691)
HADS Depression			0.67-0.69⁵	0.62-0.73⁵			0.680¹ (0.591, 0.753) 0.663³ (0.547, 0.753)		0.52-0.65⁵
SCL-90R Depression				0.734, 0.773⁶ 0.89⁷ 0.75, 0.81⁸	0.78¹⁰			0.77⁷ 0.790² (0.740, 0.832) 0.779⁴ (0.701, 0.838)	0.70¹⁰
HADS Anxiety				0.61-0.83⁵				0.49-0.73⁵	0.64-0.81⁷ 0.57-0.69⁸
SCL-90R Anxiety				0.316-0.438⁶ 0.71⁷	0.65⁹				0.62¹⁰

Legend: (…, …) = 95% Confidence interval; BDI: Beck Depression Index; STAI: State Trait Anxiety Index; MHI: Mental Health Index; ZISP: Zurzach Interdisciplinary (Schmerz) Pain Program (samples 1 and 2); ¹present study, low back pain, sample ZISP 1 (n = 173); ²present study, low back pain, sample ZISP 2 (n = 245); ³present study, fibromyalgia, sample ZISP 1 (n = 118); ⁴present study, fibromyalgia, sample ZISP 2 (n = 130), correlations of the present study are in bold and the 95% confidence interval is in brackets; ⁵Herrmann-Lingen, et al. [26], ⁶Lee, et al. [42], ⁷Steer, et al. [44], ⁸Brandt, et al. [38], ⁹Duckro, et al. [39], ¹⁰Hardt, et al. [41], ¹¹Ware, et al. [21], ¹²Findler, et al. [40], ¹³Ruta, et al. [43]