. Author manuscript; available in PMC: 2020 Jun 18.

Published in final edited form as: Res Social Adm Pharm. 2018 Jan 31;14(11):1080–1084. doi: 10.1016/j.sapharm.2018.01.007

Table 2.

Summary of Results for Internal Reliability, Test-retest Reliability, Convergent Validity, Discriminant Validity and Predictive Validity

Tests	PCS12	MCS12
Reliability
Internal Consistency
Cronbach’s Alpha	0.89	0.88
Test-retest Reliability
Intra-class Correlation Coefficient	0.82	0.73
Validity
Construct Validity (Convergent and Discriminant), correlation coefficients (r)
EuroQol Index (EQ-5D-index)^*	0.67	0.45
EuroQol Mobility^*	0.70	0.18
EuroQol SelfCare^*	0.36	0.23
EuroQol Usual Activity^*	0.71	0.37
EuroQol Pain/Discomfort^*	0.67	0.29
EuroQol Anxiety/Depression^*	0.28	0.67
EuroQol VAS^*	0.70	0.51
Perceived Health^*	0.61	0.42
Perceived Mental Health^*	0.38	0.52
Criterion Validity
Predictive Validity, mean (±SD)
Physical Limitations^*
Yes	31.23 (±10.36)
No	48.18 (±10.16)
Cognitive Limitations^*
Yes		38.18 (±14.43)
No		50.70 (±10.09)
Predictive Validity, Odds Ratio (95% Confidence Interval)
Physical limitations (round 3) predicted by PCS12 (round 2): 0.88 (0.85–0.90)
Cognitive limitations (round 3) predicted by MCS12 (round 2): 0.92 (0.89–0.95)

VAS: Visual Analog Scale; PCS12: Physical Component Summary; MCS12: Mental Component Summary;

Statistically significant at p < 0.001