Table 2 Number of studies by health outcome and study design
From: The health impact of smokeless tobacco products: a systematic review
| Â | Mortality | Morbidity | Total | ||
|---|---|---|---|---|---|
Cardiovascular | Cancer | Other | |||
Global | Â | Â | Â | Â | Â |
Meta-analysis/Pooled data | 4 | 3 | 2 | 0 | 9 |
RCT | 0 | 0 | 0 | 0 | 0 |
Cohort | 0 | 0 | 0 | 0 | 0 |
Cross-sectional | 0 | 0 | 0 | 0 | 0 |
Case control | 0 | 0 | 0 | 0 | 0 |
Case series/report | 0 | 0 | 0 | 0 | 0 |
Sub-total | 4 | 3 | 2 | 0 | 9 |
AMEA | Â | Â | Â | Â | Â |
Meta-analysis/Pooled data | 0 | 0 | 4 | 0 | 4 |
RCT | 0 | 0 | 0 | 0 | 0 |
Cohort | 1 | 1 | 0 | 0 | 2 |
Cross-sectional | 0 | 4 | 2 | 4 | 10 |
Case control | 1 | 0 | 15 | 0 | 16 |
Case series/report | 0 | 0 | 2 | 0 | 2 |
Sub-total | 2 | 5 | 23 | 4 | 34 |
Europe | Â | Â | Â | Â | Â |
Meta-analysis/Pooled data | 1 | 0 | 2 | 1 | 4 |
RCT | 0 | 0 | 0 | 0 | 0 |
Cohort | 1 | 0 | 0 | 1 | 2 |
Cross-sectional | 0 | 0 | 0 | 1 | 1 |
Case–control | 0 | 0 | 0 | 0 | 0 |
Case series/report | 0 | 0 | 0 | 0 | 0 |
Sub-total | 2 | 0 | 2 | 3 | 7 |
US | Â | Â | Â | Â | Â |
Meta-analysis/Pooled data | 1 | 0 | 1 | 0 | 2 |
RCT | 0 | 0 | 0 | 0 | 0 |
Cohort | 3 | 0 | 0 | 0 | 3 |
Cross-sectional | 0 | 1 | 0 | 2 | 3 |
Case control | 0 | 0 | 0 | 0 | 0 |
Case report | 0 | 0 | 0 | 0 | 0 |
Sub-total | 4 | 1 | 1 | 2 | 8 |
Total | 12 | 9 | 28 | 9 | 58 |