Background
Method
Participants
Measures
Patient health questionnaire nine-item (PHQ-9; [8])
Generalised anxiety disorder scale seven-item (GAD-7; [9])
Additional variables
Statistical analysis
Multiple group confirmatory factors analysis (MGCFA)
-
M1: Configural Invariance; same model structure between groups, and all parameters are free.
-
M2: Metric Invariance; invariance in loadings between groups.
-
M3: Scalar Invariance; invariance in loadings and intercepts.
-
M4: Residual Invariance; invariance in loadings, intercepts and residuals.
-
M5: Residual Invariance; invariance in loadings, intercepts, residuals and factor means.
-
M6: Residual Invariance; invariance in loadings, intercepts, residuals, factor means and variances.
Propensity score matching
Results
Descriptive statistics
Females
|
Males
| ||||||
---|---|---|---|---|---|---|---|
Variable | Category | N | % | N | % | P-value | Cramér’s V |
Local Healthcare Organisation | Trust 1 | 27,324 | 24.65% | 14,377 | 26.12% | < 0.001 | 0.022 |
Trust 2 | 15,193 | 13.71% | 7,993 | 14.52% | |||
Trust 3 | 22,427 | 20.23% | 10,758 | 19.55% | |||
Trust 4 | 45,889 | 41.40% | 21,911 | 39.81% | |||
Age | 18–24 | 18,224 | 16.44% | 7,496 | 13.62% | < 0.001 | 0.052 |
25–34 | 38,241 | 34.50% | 17,873 | 32.47% | |||
35–44 | 23,385 | 21.10% | 12,303 | 22.35% | |||
45–54 | 16,832 | 15.19% | 9,555 | 17.36% | |||
55–64 | 9,218 | 8.32% | 5,324 | 9.67% | |||
65+ | 4,933 | 4.45% | 2,488 | 4.52% | |||
Ethnicity | White | 66,194 | 59.72% | 33,977 | 61.73% | < 0.0001 | 0.047 |
Asian | 7,286 | 6.57% | 2,935 | 5.33% | |||
Black | 12,102 | 10.92% | 6,774 | 12.31% | |||
Mixed | 14,283 | 12.89% | 5,783 | 10.51% | |||
Other | 5,561 | 5.02% | 2,617 | 4.75% | |||
Missing | 5,407 | 4.88% | 2,953 | 5.37% | |||
Psychotropic Medication | Not Taking | 65,927 | 59.48% | 31,634 | 57.48% | < 0.001 | 0.020 |
Taking | 35,998 | 32.48% | 18,879 | 34.30% | |||
Missing | 8,908 | 8.04% | 4,526 | 8.22% | |||
Employment status | Employed | 80,074 | 72.25% | 37,119 | 67.44% | < 0.001 | 0.052 |
Unemployed | 26,963 | 24.33% | 16,041 | 29.14% | |||
Missing | 3,796 | 3.42% | 1,879 | 3.41% | |||
IMD Quintile | 1 | 38,745 | 34.96% | 18,981 | 34.49% | 0.003 | 0.011 |
2 | 37,918 | 34.21% | 18,724 | 34.02% | |||
3 | 18,835 | 16.99% | 9,428 | 17.13% | |||
4 | 10,974 | 9.90% | 5,560 | 10.10% | |||
5 | 2,886 | 2.60% | 1,497 | 2.72% | |||
Missing | 1,475 | 1.33% | 849 | 1.54% | |||
Problem Descriptor | Depression | 44,684 | 40.32% | 22,409 | 40.71% | < 0.001 | 0.061 |
Mixed A + D | 6,474 | 5.84% | 2,798 | 5.08% | |||
GAD | 15,518 | 14.00% | 6,179 | 11.23% | |||
OCD | 1,596 | 1.44% | 926 | 1.68% | |||
PTSD | 3,491 | 3.15% | 1,895 | 3.44% | |||
Social Phobia | 1,982 | 1.79% | 1,745 | 3.17% | |||
Other phobia & panic | 5,087 | 4.59% | 2,377 | 4.32% | |||
Unspecified anxiety | 700 | 0.63% | 360 | 0.65% | |||
Not specified | 31,301 | 28.24% | 16,350 | 29.71% | |||
Mean | SD | Mean | SD | P-value | Hedge’s g | ||
PHQ-9 score at assessment | 14.67 | 6.36 | 14.58 | 6.59 | 0.010 | 0.014 | |
GAD-7 score at assessment | 13.29 | 5.27 | 12.86 | 5.48 | < 0.001 | 0.081 |
Confirmatory factor analysis
Multiple group confirmatory factor analysis – full sample
Model | χ2 | df | CFI | RMSEA | SRMR | ΔCFI | ΔRMSEA | ΔSRMR |
---|---|---|---|---|---|---|---|---|
M1: Configural Invariance | 106,206 | 206 | 0.908 | 0.079 | 0.048 | -- | -- | -- |
M2: Metric Invariance | 106,448 | 220 | 0.908 | 0.076 | 0.049 | 0.000 | -0.003 | 0.001 |
M3: Scalar Invariance | 112,671 | 234 | 0.902 | 0.076 | 0.049 | -0.006 | 0.000 | 0.000 |
M4: Residual Invariance | 113,343 | 250 | 0.902 | 0.074 | 0.049 | 0.000 | -0.002 | 0.000 |
M5: M4 + factor means | 113,960 | 252 | 0.901 | 0.074 | 0.049 | -0.001 | 0.000 | 0.000 |
M6: M5 + factor variances | 114,191 | 255 | 0.901 | 0.073 | 0.055 | 0.000 | -0.001 | 0.006 |