Measurement invariance properties and external construct validity of the short Warwick-Edinburgh mental wellbeing scale in a large national sample of secondary school students in Wales

Table 2 Parameter estimates for overall and configural invariance models

Group	Unstandardised loading	SE	z-score	Standardised loading	Variance
All years
Q1	1			0.51	0.74
Q2	1.34	0.007	188.569	0.68	0.54
Q3	1.33	0.007	182.57	0.67	0.55
Q4	1.39	0.007	186.03	0.70	0.50
Q5	1.56	0.008	191.564	0.79	0.38
Q6	1.19	0.007	173.104	0.60	0.64
Q7	1.32	0.007	179.486	0.67	0.55
Year 7
Q1	1			0.48	0.78
Q2	1.35	0.02	72.32	0.64	0.59
Q3	1.36	0.02	70.64	0.65	0.58
Q4	1.39	0.02	71.30	0.66	0.57
Q5	1.57	0.02	74.12	0.75	0.44
Q6	1.25	0.02	69.23	0.59	0.65
Q7	1.41	0.02	70.65	0.67	0.55
Year 8
Q1	1			0.46	0.79
Q2	1.39	0.02	71.79	0.65	0.58
Q3	1.44	0.02	71.42	0.67	0.55
Q4	1.47	0.02	71.89	0.68	0.54
Q5	1.65	0.02	73.53	0.77	0.41
Q6	1.27	0.02	67.48	0.59	0.65
Q7	1.41	0.02	70.05	0.65	0.57
Year 9
Q1	1			0.51	0.74
Q2	1.37	0.02	87.39	0.69	0.52
Q3	1.34	0.02	84.94	0.68	0.54
Q4	1.38	0.02	85.91	0.70	0.51
Q5	1.56	0.02	88.73	0.79	0.37
Q6	1.19	0.02	80.36	0.60	0.64
Q7	1.31	0.02	82.63	0.67	0.56
Year 10
Q1	1			0.56	0.68
Q2	1.26	0.01	101.14	0.71	0.49
Q3	1.18	0.01	94.60	0.67	0.56
Q4	1.32	0.01	100.04	0.74	0.45
Q5	1.43	0.01	103.19	0.80	0.35
Q6	1.07	0.01	88.22	0.61	0.63
Q7	1.19	0.01	92.93	0.67	0.55
Year 11
Q1	1			0.59	0.66
Q2	1.23	0.01	101.44	0.72	0.48
Q3	1.15	0.01	94.82	0.68	0.55
Q4	1.29	0.01	99.84	0.76	0.43
Q5	1.39	0.01	103.62	0.81	0.34
Q6	1.03	0.01	86.13	0.61	0.63
Q7	1.15	0.01	92.09	0.67	0.55

ISSN: 1477-7525