Table 1 Maximal difference of the averaged item locations and associated p-value for each item of the three dimensions studied, and for the variables gender, age, region and year of survey

General Health

GH1

-

0.77

0.70

0.0055

-

0.98

-

0.23

GH11a

-

0.20

1.01

0.0049

-

0.95

-

0.14

GH11b

-

0.80

-

0.084

-

0.77

-

0.38

GH11c

-

0.065

-

0.39

-

0.14

-

0.38

GH11d

-

0.18

-

0.71

-

0.19

-

0.50

Physical Functioning

PF12

-

0.84

-

0.97

-

0.90

-

0.10

PF3

0.60

0.005

-

0.26

-

0.51

0.16

0.0264

PF45

-

0.84

-

0.87

-

0.79

0.17

0.0418

PF6

-

0.97

0.41

0.0498

-

0.90

-

0.070

PF789

-

0.56

-

0.067

-

0.81

-

0.14

PF10

-

0.23

-

0.99

-

0.99

-

0.23

Mental Health

MH1

-

0.89

0.77

0.0003

-

0.86

-

0.89

MH2

-

0.68

-

0.93

-

0.99

-

0.13

MH3

-

0.88

-

0.56

-

0.51

-

0.22

MH4

-

0.35

-

0.71

-

0.99

-

0.95

MH5

-

0.21

-

0.18

-

0.48

-

0.19