Table 2

Country-specific results of Rasch analysis

Item fit residualPerson fit residualχ2 InteractionProportion of significant t-tests (95% CI)
AnalysisMeanSDMeanSDValue (df)p ValuePSIN
NorwayASAnalysis 10.3151.643−0.2381.186163.045 (78)0.0010.97142
Analysis 20.1890.87−0.3221.13112.005 (14)0.6060.9471420.085 (0.049 to 0.120)
FinlandASAnalysis 10.4181.197−0.2142.13638.262 (39)0.5030.96985
Analysis 20.4210.612−0.2371.1028.780 (7)0.2690.927850.094 (0.048 to 0.140)
SwedenASAnalysis 10.3790.991−0.252.136121.031 (78)0.0010.901102
Analysis 20.380.624−0.2771.196.818 (7)0.4480.6231020.040 (−0.003 to 0.082)
The NetherlandsASAnalysis 10.3551.362−0.2612.20850.328 (39)0.1060.97882
Analysis 20.4810.998−0.251.1674.281 (7)0.7470.947820.123 (0.076 to 0.171)
PortugalASAnalysis 10.4211.353−0.6622.94654.546 (39)0.5020.966121
Analysis 20.3720.291−0.3641.2056.021 (7)0.5370.9021210.057 (0.019 to 0.097)
SpainASAnalysis 10.2771.947−0.2892.199184.606 (78)0.0010.976129
Analysis 20.3011.116−0.3451.17512.970 (14)0.5290.9531280.070 (0.033 to 0.108)
AustriaPsAAnalysis 10.2861.147−0.3822.04197.313 (78)0.0680.967123
Analysis 20.6111.021−0.3631.28411.541 (14)0.6430.9311190.076 (0.036 to 0.115)
NorwayPsAAnalysis 10.3791.258−0.081.671156.851 (78)<0.0010.969142
Analysis 20.4420.654−0.2371.02310.012 (14)0.7610.9331420.056 (0.021 to 0.093)
FinlandPsAAnalysis 10.2971.121−0.1592.03255.614 (39)0.0410.97782
Analysis 20.1380.88−0.2561.0416.044 (7)0.5350.954820.061 (0.014 to 0.108)
SwedenPsAAnalysis 10.4321.003−0.2692.16951.271 (39)0.090.9682
Analysis 20.5190.617−0.391.28110.698 (7)0.1520.91820.074 (0.027 to 0.122)
The NetherlandsPsAAnalysis 10.6091.708−0.2332.30177.078 (39)<0.0010.974110
Analysis 20.8051.316−0.2551.1816.117 (7)0.5260.9361080.093 (0.051 to 0.134)
PortugalPsAAnalysis 10.3791.862−0.6792.986162.025 (78)<0.0010.983126
Analysis 20.4381.119−0.4991.35712.743 (14)0.5470.9591260.065 (0.026 to 0.103)
SpainPsAAnalysis 10.5441.761−0.1692.16690.500 (39)<0.0010.974115
Analysis 20.441.154−0.3011.1255.473 (7)0.6020.9541140.070 (0.030 to 0110)
FinlandSScAnalysis 10.5321.596−0.4762.613126.607 (78)<0.0010.969167
Analysis 20.2970.897−0.4271.3217.624 (14)0.2240.9291670.083 (0.051 to 0.117)
The NetherlandsSScAnalysis 10.4531.59−0.1882.15489.627 (39)<0.0010.97899
Analysis 20.8360.745−0.2481.2486.862 (7)0.4430.951990.040 (−0.003 to 0.083)
PortugalSScAnalysis 10.380.7980.0551.99922.310 (39)0.9850.97728
Analysis 20.6450.529−0.0110.9753.037 (7)0.8820.938280.107 (0.026 to 0.188)
SpainSScAnalysis 10.2911.146−0.0521.74852.626 (39)0.0710.9839
Analysis 20.4750.859−0.0570.8814.891 (7)0.6730.969390.051 (−0.017 to 0.120)
The NetherlandsSLEAnalysis 10.5111.818−0.3292.626112.920 (39)<0.0010.970123
Analysis 20.3971.176−0.3461.2445.862 (7)0.5560.9391230.059 (0.020 to 0.098)
PortugalSLEAnalysis 10.1821.264−0.4262.405164.349 (78)<0.0010.973142
Analysis 20.4160.957−0.4231.31711.591 (14)0.6390.9361420.049 (0.013 to 0.085)
SpainSLEAnalysis 10.5081.542−0.0201.700104.037 (39)<0.0010.96495
Analysis 20.4940.651−0.2331.05319.5810.1440.933950.055 (0.010 to 0.100)
FinlandFMSAnalysis 10.2621.401−0.1921.82457.954 (39)0.0260.969105
Analysis 20.3240.879−0.1710.9533.438 (7)0.8420.9361050.059 (0.017 to 0.101)
NorwayFMSAnalysis 10.2671.612−0.1071.529126.819 (78)<0.0010.96133
Analysis 20.2220.736−0.2571.00912.144 (14)0.5950.9281330.045 (0.008 to 0.082)
PortugalFMSAnalysis 10.5270.725−0.2272.63573.211 (39)<0.0010.9941
Analysis 20.6870.589−0.1281.2017.339 (7)0.3940.984410.073 (0.006 to 0.140)
SpainFMSAnalysis 10.3881.5180.1661.548120.972 (39)<0.0010.97150
Analysis 20.1950.640−0.1050.7068.157 (7)0.3190.946500.040 (−0.020 to 0.100)
AustriaOAAnalysis 10.1470.827−0.1221.79461.360 (39)0.0130.95147
Analysis 20.551.136−0.2241.14112.759 (7)0.0780.886470.085 (0.023 to 0147)
The NetherlandsOAAnalysis 10.4311.497−0.2572.42333.770 (273)0.0070.976121
Analysis 20.2940.784−0.2841.1545.692 (7)0.5760.9471210.041 (0.003 to 0.081)
NorwayOAAnalysis 10.2271.489−0.2551.72113.076 (78)0.0060.97138
Analysis 20.3950.811−0.2961.10316.310 (14)0.2950.9471380.044 (0.007 to 0.081)
PortugalOAAnalysis 1−0.4271.832−1.8853.59378.487 (39)<0.0010.99277
Analysis 20.4931.710−0.4521.35014.765 (7)0.0390.987770.064 (0.016 to 0.114)
SpainOAAnalysis 10.2840.80.1432.32970.7620.0010.9523
Analysis 20.2720.543−0.1210.9677.426 (7)0.3860.89230.130 (0.041 to 0.220)
Expected values for a perfect model fit0101>0.05>0.70Lower-bound CI<0.05
  • Analysis 1=Rasch analysis of the ENAT as a 39-item scale; Analysis 2=Rasch analysis of the ENAT as a 7-domain scale.

  • AS, ankylosing spondylitis; DF, degrees of freedom; ENAT, educational needs assessment tool; FMS, fibromyalgia syndrome; OA, osteoarthritis; p, χ2 probability (significant p, item misfit); PsA, psoriatic arthritis; PSI, Person Separation Index; SLE, systemic lupus erythematosus; SSc, systemic sclerosis.