Quality of the included studies
| First author | Publication year | Drug treatment | Number of smokers | Diagnostic criteria | Treatment duration | Measurement of blood drug concentration | Sampling scheme | Total score |
|---|---|---|---|---|---|---|---|---|
| Haslemo | 2006 | Olanzapine | Yes | NA | Yes | Yes | Yes | 4 |
| Nozawa | 2008 | Olanzapine | Yes | Yes | Yes | Yes | NA | 4 |
| Bigos | 2008 | Olanzapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Laika | 2009 | Olanzapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Citrome | 2009 | Olanzapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Spina | 2009 | Olanzapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Skogh | 2011 | Olanzapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Haslemo | 2011 | Olanzapine | Yes | NA | NA | Yes | Yes | 3 |
| Dettling | 2000 | Clozapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Palego | 2002 | Clozapine | Yes | Yes | Yes | Yes | Yes | 5 |
| Weide | 2003 | Clozapine | Yes | NA | Yes | Yes | Yes | 4 |
| Haslemo | 2006 | Clozapine | Yes | NA | Yes | Yes | Yes | 4 |
NA, not available.