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Table 2 CVI, CVR, T-value and factor loadings of the tool items

From: Validation and psychometric properties of the drug users’ quality of life scale in Iranian population

No Items CVRa CVIb Kappa Coe.c Mean (SD) Kurtosisd Skewnesse T (cr)f λg
1 Being Useful For society and help to people 0.46 0.93 0.93 4.26(1.77) −0.753 −0.261 9.24 0.55***
2 Accessible Community Resources 0.86 0.93 0.93 3.58(1.83) −0.93 0.145 6.47 0.4***
3 Drugs 0.6 0.86 0.86 2.45(1.88) −0.126 1.035 5.22 0.33***
4 Drug Treatment 0.6 0.93 0.93 5.31(1.77) 0.102 −0.98 −4.69 0.30***
5 Education and training 0.55 0.86 0.86 3.6(2.01) −1.205 0.205 7.27 0.44***
6 Family 0.75 1 1 4.86(2.12) −0.945 −0.672 9.07 0.54***
7 Feeling Good about Yourself 0.75 0.93 0.93 4.27(1.26) −1.168 −0.124 10.81 0.62***
8 Independence and Free Choice 0.75 1 1 4.7(1.86) −0.683 −0.598 6.34 0.39***
9 Friends 0.75 0.93 0.93 3.44(1.96) −1.094 0.284 5.28 0.33***
10 Caring for Harm Reduction 0.46 0.86 0.86 4.23(1.96) −1.057 −0.246 6.52 0.4***
11 Physical and mental Health 0.46 0.93 0.93 4.3(1.86) −1.035 −0.14 9.79 0.57***
12 Accessible Health Care services 0.46 0.8 0.79 4.6(1.92) −0.708 −0.557 5.74 0.36***
13 Housing 0.46 0.86 0.86 4.4(2.1) −1.083 −0.473 10.2 0.59***
14 How others treat you 0.6 0.93 0.93 3.9(1.79) −1.03 0.055 11.19 0.64***
15 Leisure Activities 0.75 0.86 0.86 3.75(1.75) −0.77 0.06 8.55 0.51***
16 Income/ Money 0.6 0.93 0.93 2.95(1.88) −0.861 0.587 10.07 0.55***
17 Neighborhood Safety 0.46 1 1 4.4(1.97) −0.998 −0.407 9.56 0.53***
18 Partner(s) 0.6 0.93 0.93 2.8(2.7) −1.22 0.373 6.05 0.32***
19 Feeling towards the future 0.6 0.93 0.93 4.46(2.02) −1.061 −0.104 10.29 0.6***
20 Sex 0.6 0.93 0.93 2.07(1.68) 1.191 1.488 5 0.31***
21 Spirituality 0.86 1 1 5(1.73) −0.338 −0.701 6.53 0.4***
22 Transportation 0.46 0.93 0.93 3.5(2.14) −1.318 0.194 8.78 0.52***
  1. a- Content Validity Ratio
  2. b- Content Validity Index
  3. c- Modified coefficient Kappa (The coefficient of agreement of experts in CVR & CVI)
  4. d- Skewness is a measure of symmetry, or more precisely, the lack of symmetry
  5. e-Kurtosis is a measure of whether the data are heavy-tailed or light-tailed relative to a normal distribution
  6. f- The calculated values of t for all factor loadings of the first and second order are greater than 1.96 and are therefore significant at the 95% confidence level, g- The specific value, which is denoted by the Lamda coefficient and the statistical symbol λ, is calculated from the sum of the factors of the factor loads related to all the variables of that factor
  7. *** p < 0.001
  8. ** p < 0.01
  9. * p < 0.05
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