| No. | Name of Lifestyle | Third Class | Second Class | First Class | Type | No. of Studies |
|---|---|---|---|---|---|---|
| 1 | Lutein+African Americans | NA | Lutein+Racial differences | Joint effect | No statistical significance factor | 1 |
| 2 | Lutein+Caucasians | NA | Lutein+Racial differences | Joint effect | No statistical significance factor | 1 |