| Variable | mean | SD | p-value |
| Nationality |
|
|
|
| · Saudi | 12.2779 | 2.34355 | 0.461 |
| · Non-Saudi | 11.9730 | 2.71300 | |
| Region |
|
|
|
| · North | 12.5784 | 2.15919 | 0.123 |
| · South | 12.2908 | 2.56776 | |
| · East | 12.1864 | 2.48773 | |
| · West | 11.9556 | 2.02210 | |
| · Center | 11.1429 | 2.30837 | |
| Education level |
|
|
|
| · Illiterate | 11.6429 | 2.27384 | 0.008* |
| · School education | 12.0492 | 2.41159 | |
| · Graduate | 12.0400 | 2.38249 | |
| · Postgraduate | 13.0244 | 2.21652 | |
| Occupation |
|
|
|
| · Working | 12.7381 | 2.31870 | 0.031* |
| · Housekeeper | 12.1021 | 2.38372 | |
| Monthly income |
|
|
|
| · Less than 5000 SR | 11.5132 | 2.45761 | 0.001* |
| · Between 5000 to 10,000 SR | 12.1570 | 2.33303 | |
| · More than 10,000 SR | 12.8417 | 2.26777 | |
| The views of USS cost |
|
|
|
| · Cheap | 12.1132 | 2.50891 | 001* |
| · Average | 11.8012 | 2.27679 | |
| · Costly | 12.8264 | 2.34843 |