Assessing the reliability of the short form 12 (SF-12) health survey in adults with mental health conditions: a report from the wellness incentive and navigation (WIN) study

Table 5 Test-Retest Correlation Coefficients in Control Group (n = 417)

Variable	Pearson’s Correlation Coefficient between Two Years (95% CI)						Adjusted ICC^a
Variable	BL-Y1	BL -Y2	BL -Y3	Y1-Y2	Y1-Y3	Y2-Y3	Adjusted ICC^a
PF	0.63 (0.57,0.69)	0.66 (0.60,0.71)	0.57 (0.50,0.63)	0.67 (0.62,0.72)	0.60 (0.53,0.66)	0.62 (0.56,0.68)	0.54
RP	0.48 (0.40,0.55)	0.51 (0.43,0.57)	0.48 (0.40,0.55)	0.49 (0.41,0.56)	0.51 (0.43,0.58)	0.54 (0.47,0.61)	0.44
BP	0.57 (0.50,0.63)	0.60 (0.54,0.66)	0.52 (0.45,0.59)	0.58 (0.51,0.64)	0.51 (0.43,0.57)	0.57 (0.50,0.63)	0.48
GH	0.55 (0.48,0.61)	0.58 (0.51,0.64)	0.55 (0.48,0.61)	0.57 (0.50,0.63)	0.56 (0.50,0.63)	0.58 (0.51,0.64)	0.51
VT	0.47 (0.40,0.55)	0.47 (0.39,0.54)	0.46 (0.38,0.53)	0.48 (0.40,0.55)	0.46 (0.38,0.54)	0.52 (0.45,0.59)	0.45
SF	0.43 (0.35,0.51)	0.42 (0.34,0.49)	0.39 (0.30,0.47)	0.50 (0.42,0.57)	0.39 (0.31,0.47)	0.49 (0.41,0.56)	0.42
RE	0.44 (0.35,0.51)	0.48 (0.40,0.55)	0.50 (0.43,0.57)	0.52 (0.45,0.59)	0.45 (0.37,0.52)	0.47 (0.39,0.54)	0.43
MH	0.57 (0.50,0.63)	0.53 (0.46,0.60)	0.49 (0.41,0.56)	0.55 (0.48,0.61)	0.50 (0.42,0.57)	0.55 (0.47,0.61)	0.52
PCS	0.70 (0.64,0.74)	0.71 (0.66,0.76)	0.61 (0.55,0.67)	0.71 (0.65,0.75)	0.64 (0.58,0.70)	0.71 (0.66,0.75)	0.61
MCS	0.58 (0.51,0.64)	0.58 (0.52,0.64)	0.51 (0.44,0.58)	0.61 (0.54,0.67)	0.52 (0.45,0.59)	0.61 (0.55,0.67)	0.57

^a For each scale, the ICCs were computed using four repeated assessments (baseline, year 1, 2 and 3), adjusting for age, sex, race/ethnicity, and CRG

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