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Table 4 Item-scale correlation matrix for the eight SF-12v2 scales and summary measures*

From: The 12-item medical outcomes study short form health survey version 2.0 (SF-12v2): a population-based validation study from Tehran, Iran

  PF RP BP GH SF RE VT MH PCS MCS
PF           
PF1 0.93 0.59 0.53 0.48 0.37 0.35 0.35 0.26 0.80 0.13
PF2 0.94 0.59 0.54 0.50 0.37 0.36 0.39 0.29 0.81 0.16
RP           
RP1 0.57 0.94 0.54 0.46 0.43 0.55 0.38 0.31 0.69 0.33
RP2 0.62 0.94 0.59 0.49 0.45 0.53 0.39 0.33 0.74 0.32
BP           
BP1 0.57 0.60 1.00 0.56 0.48 0.46 0.46 0.42 0.75 0.36
GH           
GH1 0.51 0.49 0.55 0.98 0.40 0.39 0.50 0.44 0.66 0.40
SF           
SF1 0.40 0.46 0.48 0.41 1.00 0.48 0.37 0.46 0.39 0.63
RE           
RE1 0.36 0.55 0.42 0.38 0.45 0.94 0.34 0.50 0.28. 0.71
RE2 0.35 0.53 0.44 0.38 0.46 0.94 0.35 0.49 0.27 0.71
VT           
VT1 0.39 0.41 0.46 0.50 0.37 0.37 1.00 0.49 0.43 0.58
MH           
MH1 0.24 0.28 0.37 0.41 0.37 0.39 0.51 0.83 0.16 0.71
MH2 0.25 0.30 0.34 0.35 0.43 0.50 0.33 0.85 0.11 0.74
  1. * Figures are Spearman's correlation coefficient (rho). All correlations were significant at the 0.01 levels. Correlation values of 0.4 or above were considered satisfactory (correlations ≥ 0.81-1.0 as excellent, 0.61-0.80 very good, 0.41-0.60 good, 0.21-0.40 fair, and 0-0.20 poor) [25].