Table 2 Standardized mean difference of controlled covariates before and after matching
Variables | Pre-matched data | Model 1 | Model 2 | Model 3 |
|---|---|---|---|---|
Std. Mean Diff | Std. Mean Diff | Std. Mean Diff | Std. Mean Diff | |
Age | -0.016 | -0.031 | -0.030 | -0.049 |
Gender | ||||
Male | 0.080 | 0.092 | 0.046 | 0.093 |
Female | -0.080 | -0.092 | -0.046 | -0.093 |
Ethnicity | ||||
Chinese | -0.076 | 0.021 | -0.115 | -0.081 |
Malay | 0.017 | -0.053 | 0.066 | 0.044 |
Indian & others | 0.090 | 0.030 | 0.089 | 0.066 |
Education level | ||||
Secondary or below (include N/O level) | -0.128 | -0.167 | -0.117 | -0.115 |
A level, polytechnic, and other diploma | 0.251 | 0.191 | 0.217 | 0.091 |
Degree or above | -0.122 | -0.018 | -0.099 | 0.030 |
Marital status | ||||
Single | 0.111 | 0.053 | 0.088 | 0.032 |
Married, divorced & widowed | -0.111 | -0.053 | -0.088 | -0.032 |
Monthly household income | ||||
< SGD5,999 | -0.003 | -0.016 | 0.049 | 0.075 |
SGD6,000 or above | 0.036 | 0.069 | -0.009 | -0.007 |
NA/DK | -0.042 | -0.068 | -0.056 | -0.094 |
Relationship to the PWD | ||||
Spouse | -0.270 | -0.212 | -0.198 | -0.042 |
Son | 0.076 | 0.021 | 0.052 | 0.044 |
Daughter | -0.001 | 0.000 | 0.000 | 0.034 |
Others | 0.149 | 0.158 | 0.113 | -0.057 |
No. of PWD’s ADL | 0.716 | 0.482 | 0.550 | -0.076 |
No. of PWD’s IADL | 1.188 | 0.495 | 0.963 | -0.114 |
PWD’s memory and behaviour problems | -0.189 | -0.150 | -0.185 | -0.033 |