. Author manuscript; available in PMC: 2018 Sep 1.

Published in final edited form as: Aging Ment Health. 2016 May 20;21(9):975–982. doi: 10.1080/13607863.2016.1186153

Table 2.

Descriptive results for COPD patients and caregivers (N = 89 patients and 89 caregivers)

	1	2	3	4	5	6	7	8	9	10	Patients X̅ (SD)	Caregivers X̅(SD)	Paired t-test
1. Age	.38^**	.52^**	−.17	.12	−.29^*	.12	−.06	−.24^*	.25^*	.23^*	67.67 (8.2)	54.84 (16.0)	8.05^**
2. Income¹	.35^**	.34^**	−.43^**	−.04	−.16	.24^*	.28^*	−.28^*	.21^*	−.01	2.67 (1.1)	2.72 (1.1)	−.33
3. General Health²	−.16	−.26^*	−.10	.14	.41^**	−.25^*	−.16	.07	.29^**	.29^**	3.20 (1.03)	2.60 (1.0)	4.18^**
4. Activities of Daily Living³	−.29^**	−.32^**	.30^**	−.07	.09	−.10	−.04	−.12	.08	.06	.84 (1.5)	.10 (.5)	4.17^**
5. Depression⁴	−.32^**	−.46^**	.40^**	.54^**	.28^**	−.14	−.24	.05	.31^**	.36^**	7.44 (5.9)	3.68 (3.9)	5.67^**
6. Pt Network Support⁵	.10	.31^**	−.07	−.12	−.30^**	--	.30^*	−.23^*	.18	−.28^**	16.36 (6.7)	--	--
7. Pt Self-Management⁶	.10	.15	.05	−.16	−.15	.30^*	--	−.30^*	−.02	−04	.78 (.4)	--	--
8. PT COPD Severity⁷	−.30^*	−.33^**	.45^**	.37^**	.40^**	−.23	−.30^*	--	−.16	.16	7.15 (3.9)	--	--
9. Comorbidities⁸	−.11	−.19	.25^*	.17	.25^*	−.19	−.06	.22^*	--	.24^*	1.83 (1.4)	2.70 (2.2)	--
10. Caregiver Burden⁹	−.27^*	−.04	.12	.25^*	.34^**	−.28^**	−.04	.16	.24^*	--	--	21.0 (13.6)	--

Note. PT = Patient; CG = Caregiver, X̅= Mean, SD = standard Deviation, t = paired samples t-test; correlations for patients are on the lower diagonal, correlations for caregivers are on the upper diagonal and partial correlations between patients and caregivers are in bold on the diagonal.

^**

p≤.01,

p≤.05

Single item. “Would you say your health in general is:” 1 = excellent; 2 = very good; 3 = good; 4 = fair; 5 = poor.

Katz ADL scale (Katz et al., 1963). Scores can range from 0 to 6 – higher scores indicate greater impairment.

⁴

PHQ-9 (Kroenke & Spitzer, 2002). Scores can range from 0–27; higher scores indicate greater depressive symptomatology.

⁵

Lubben Social Network Scale (Lubben, 1988). Scores range from 0 to 30, with higher scores indicating greater social network support.

⁶

Patient has routine checkups, even when not experiencing difficulty breathing: 1 = yes, 0 = no.

⁷

COPD Severity Index (Eisner et al., 2005). Scores can range from 0 to 25; higher scores indicate greater COPD severity.

⁸

Different comorbidities were assessed for patients and caregivers. For patients, scores could range from 0 to 7 with higher scores indicating more comorbidities. For caregivers, scores could range from 0 to 10 with higher scores indicating more comorbidities.

⁹

Zarit Burden Interview (Zarit et al., 1980). Scores range from 0 to 88, with higher scores reflecting greater burden. Scores ≥ 60 indicate severe burden, scores 41 to 60 indicate moderate to severe burden, and scores ≤ 40 indicate mild to no burden.