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Table 2 Description of scales, tests of item internal consistency and discriminant validity (N= 524).

From: Quality of Life in rural and urban populations in Lebanon using SF-36 Health Survey

Scale

Ka

Mean (SD)

Ceiling/ floor (%)

Item SD (range)

Range of correlations

Internal Consistency Testsd

Discriminant Validity Testse

     

Item – Internal consistency b

Item – Discriminant validity c

Success Rate (%)

Success Rate (%)

PF

10

81.34 (22.81)

30.9/0.6

0.31–0.86

0.54–0.77

0.11 – 0.47

100

100

RP

4

63.64 (40.64)

47.3/21.2

0.48

0.68 – 0.74

0.28 – 0.48

100

100

BP

2

68.91 (30.68)

38/2.9

1.52–1.73

0.80

0.34 – 0.52

100

100

GH

5

66.32 (22.93)

3.2/1.3

1.22–1.43

0.36 – 0.66

0.09 – 0.57

80

95

VT

4

60.87 (22.54)

5.0/1.0

1.44–1.60

0.47 – 0.56

0.33–0.50

100

100

SF

2

68.87 (29.66)

30.3/3.8

1.34–1.37

0.54

0.33 – 0.51

100

100

RE

3

53.08 (43.39)

40.3/32.3

0.50

0.67–0.73

0.31 – 0.47

100

100

MH

5

62.87 (22.53)

5.0/0.6

1.51–1.63

0.41 – 0.59

0.12 – 0.56

100

100

  1. a : Number of items and number of internal consistency tests per scale. b: Correlations between items and hypothesized scale corrected for overlap. c: Correlations between items and other scales. d: Number = 0.40. e: Number of correlations significantly higer/total number of correlations. SD = standard deviation; % ceiling (USA): 1–56; % floor (USA): 1–24 [20].