Table 4.

Association between Instrument Scores and Mortality

	HR* (CI 95%)	p value	Adj HR*# (CI 95%)	p value	p value Interaction*# (depression symptoms x instrument)
Instrument
SF-12
PCS	0.80 (0.75–0.85)	<0.001	0.87 (0.82–0.93)	<0.001	0.94
MCS	0.90 (0.85–0.95)	<0.001	0.94 (0.89–1.01)	0.078	0.66
EQ-5D	0.84 (0.80–0.89)	<0.001	0.89 (0.84–0.95)	<0.001	0.59
SF-36 (Vitality)	0.83 (0.79–0.88)	<0.001	0.91 (0.85–0.96)	0.002	0.25
EORTC QLQ-30^	1.18 (1.12–1.25)	<0.001	1.09 (1.03–1.16)	0.004	1.00
EORTC QLQ-LC13	1.24 (1.18–1.31)	<0.001	1.14 (1.08–1.21)	<0.001	0.008
Powe Fatalism Inventory^	0.95 (0.90–1.01)	0.11	0.96 (0.90–1.03)	0.25	0.38
MOS Social Support Survey^
Emotional/Informational	0.96 (0.91–1.02)	0.21	1.01 (0.95–1.07)	0.71	0.04
Tangible/instrumental	0.96 (0.91–1.01)	0.12	0.98 (0.93–1.04)	0.53	0.26

^*Scores standardized to unit of one standard deviation for comparison;

^#Adjusted by age, race, sex, income, education, smoking history, marital status, comorbidities and cancer stage and histology;

^{^}Selected items

Abbreviations: SF-12= Medical Outcomes Study 12-item short form, EQ-5D=EuroQol questionnaire, SF-36 Medical Outcomes Study 36-item short form vitality scale, EORTC QLQ-30= European Organization for Research and Treatment of Cancer Quality of Life Questionnaire, LC-13=Lung Cancer Modular Questionnaire, and MOS=Medical Outcomes Study.