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. 2013 May 6;13:127. doi: 10.1186/1471-244X-13-127

Table 9.

Transformation of total scale scores

< Secondary school
≥ Secondary school
18-39
40-55
18-39
40-55
PD P z T IQ PD P z T IQ PD P z T IQ PD P z T IQ
0-35
1
< −2.18
< 28
< 67
0-20
1
< −2.26
< 27
< 66
0-20
1
< −3.47
< 15
< 48
0-35
1
< −2.28
< 27
< 66
0-35
1
< −2.18
< 28
< 67
21-25
1
−2.26
27
66
21-25
1
< −3.47
< 15
< 48
0-35
1
< −2.28
< 27
< 66
0-35
1
< −2.18
< 28
< 67
26-30
2
−1.93
31
71
26-30
1
−3.47
15
48
0-35
1
< −2.28
< 27
< 66
0-35
1
< −2.18
< 28
< 67
31-35
6
−1.60
34
76
31-35
1
−3.072
19
54
0-35
1
< −2.28
< 27
< 66
36-40
1
−2.18
28
67
36-40
10
−1.27
37
81
36-40
1
−2.673
23
60
36-40
1
−2.28
27
66
41-45
2
−1.77
32
73
41-45
17
−0.93
41
86
41-45
1
−2.274
27
66
41-45
3
−1.91
31
71
46-50
7
−1.36
36
80
46-50
26
−0.60
44
91
46-50
2
−1.876
31
72
46-50
6
−1.54
35
77
51-55
19
−0.95
40
86
51-55
39
−0.27
47
96
51-55
6
−1.477
35
78
51-55
12
−1.17
38
82
56-60
33
−0.54
45
92
56-60
54
0.06
51
101
56-60
14
−1.079
39
84
56-60
21
−0.80
42
88
61-65
45
−0.13
49
98
61-65
64
0.39
54
106
61-65
25
−0.68
43
90
61-65
32
−0.43
46
94
66-70
56
0.28
53
104
66-70
76
0.72
57
111
66-70
38
−0.28
47
96
66-70
44
−0.06
49
99
71-75
67
0.69
57
110
71-75
85
1.05
61
116
71-75
53
0.12
51
102
71-75
60
0.31
53
105
76-80
82
1.09
61
116
76-80
91
1.38
64
121
76-80
66
0.52
55
108
76-80
75
0.68
57
110
81-85
93
1.50
65
123
81-85
95
1.71
67
126
81-85
79
0.91
59
114
81-85
84
1.05
60
116
86-90
99
1.91
69
129
86-90
96
2.04
70
131
86-90
89
1.31
63
120
86-90
91
1.42
64
121
> 90
99
> 1.91
> 69
> 129
91-95
98
2.37
74
136
91-95
95
1.71
67
126
91-95
95
1.79
68
127
> 90
99
> 1.91
> 69
> 129
> 96
> 98
> 2.37
> 74
> 136
96-100
99
2.11
71
132
96-100
98
2.16
72
132
> 90
99
> 1.91
> 69
> 129
> 96
> 96
> 96
> 96
> 96
> 101
99
> 2.11
> 71
> 132
101-105
99
2.53
75
138
> 90
99
> 1.91
> 69
> 129
> 96
> 96
> 96
> 96
> 96
> 101
99
> 2.11
> 71
> 132
> 105
99
> 2.53
> 75
> 138
N
64
N
109
N
202
N
134
Mean
64.63
Mean
57.12
Mean
71.53
Mean
68.84
SD
12.213
SD
15.109
SD
12.544
SD
13.507
Median
64
Median
56
Median
71
Median
70
Skewness
−0.007
Skewness
0.156
Skewness
−0.123
Skewness
−0.034
Kurtosis
−0.890
Kurtosis
−0.124
Kurtosis
−0.218
Kurtosis
−0.244
Range 37-88 Range 21-94 Range 30-98 Range 38-105