Covariate balance is the extent to which the distribution of covariates is similar across the intervention groups.
Standardized mean differences
The Standardized Mean Difference (SMD) represents a standardized difference in mean between contrasted intervention groups for each covariate.
|
|
Means intervention group
|
Means control group
|
Standardized mean difference
|
|
distance
|
0.925057100
|
0.823514045
|
1.310700718
|
|
age_cd
|
10.480069606
|
6.118489785
|
1.025914956
|
|
sex_cd
|
1.514035359
|
1.484918076
|
0.058257493
|
|
residence_area_cdES241
|
0.164072339
|
0.174890827
|
-0.029212219
|
|
residence_area_cdES242
|
0.098104038
|
0.094572887
|
0.011871200
|
|
residence_area_cdES243
|
0.737823623
|
0.730536286
|
0.016568982
|
|
institutionalized_blTRUE
|
0.007470582
|
0.005556812
|
0.022224954
|
|
foreign_blTRUE
|
0.127859671
|
0.222272462
|
-0.282729327
|
|
pregnancy_blTRUE
|
0.019706786
|
0.030389929
|
-0.076862258
|
|
essential_worker_blTRUE
|
0.005550689
|
0.006044669
|
-0.006648819
|
|
comorbidities_blTRUE
|
0.375748926
|
0.148284766
|
0.469660953
|
|
immunestatus_blTRUE
|
0.026308922
|
0.010590069
|
0.098210682
|
|
|
Means intervention group
|
Means control group
|
Standardized mean difference
|
|
distance
|
0.500000059
|
0.499999941
|
6.854922e-04
|
|
age_cd
|
11.615281975
|
11.615246515
|
9.918098e-06
|
|
sex_cd
|
1.521130553
|
1.521129239
|
2.628973e-06
|
|
residence_area_cdES241
|
0.164656641
|
0.164699980
|
-1.168584e-04
|
|
residence_area_cdES242
|
0.098138641
|
0.098011250
|
4.282034e-04
|
|
residence_area_cdES243
|
0.737204718
|
0.737288770
|
-1.909613e-04
|
|
institutionalized_blTRUE
|
0.008934470
|
0.008899010
|
3.768309e-04
|
|
foreign_blTRUE
|
0.107874232
|
0.107859785
|
4.656816e-05
|
|
pregnancy_blTRUE
|
0.015835930
|
0.015837244
|
-1.051993e-05
|
|
essential_worker_blTRUE
|
0.006582326
|
0.006553433
|
3.573019e-04
|
|
comorbidities_blTRUE
|
0.433833312
|
0.433835938
|
-5.299864e-06
|
|
immunestatus_blTRUE
|
0.030386127
|
0.030371681
|
8.416352e-05
|
Variance ratios
The variance ratio (VR) represents the ratio of the variance in the contracted intervention groups for each covariate. A VR close to 1, implies that variances are similar in the compared groups and as such indicates good covariate balance.
|
|
Var. Ratio
|
|
distance
|
0.5387455
|
|
age_cd
|
1.1165740
|
|
sex_cd
|
1.0001112
|
|
residence_area_cdES241
|
NA
|
|
residence_area_cdES242
|
NA
|
|
residence_area_cdES243
|
NA
|
|
institutionalized_blTRUE
|
NA
|
|
foreign_blTRUE
|
NA
|
|
pregnancy_blTRUE
|
NA
|
|
essential_worker_blTRUE
|
NA
|
|
comorbidities_blTRUE
|
NA
|
|
immunestatus_blTRUE
|
NA
|
|
|
Var. Ratio
|
|
distance
|
1.0053051
|
|
age_cd
|
0.9997302
|
|
sex_cd
|
0.9999998
|
|
residence_area_cdES241
|
NA
|
|
residence_area_cdES242
|
NA
|
|
residence_area_cdES243
|
NA
|
|
institutionalized_blTRUE
|
NA
|
|
foreign_blTRUE
|
NA
|
|
pregnancy_blTRUE
|
NA
|
|
essential_worker_blTRUE
|
NA
|
|
comorbidities_blTRUE
|
NA
|
|
immunestatus_blTRUE
|
NA
|
Propensity score distribution