From: Causal assessment of smoking and tooth loss: A systematic review of observational studies
Author, year | Unit of exposure | Smoking status | Sex | Exposure Effect size | P for trend | |||||
---|---|---|---|---|---|---|---|---|---|---|
Ojima, 2007 | Pack-years | Current | M | 1-9 1.34* | 10-19 2.75 | 20- 5.17 | Â | Â | Â | <0.0001 |
 |  | Current | F | 1-9 1.31* | 10- 5.34 |  |  |  |  | 0.0004 |
Hanioka, 2007 | Pack-years | Current | M | 1-19 1.99 | 20-59 2.20 | 60- 2.94 | Â | Â | Â | <0.0001 |
 |  | Current | F | 1-19 1.74 | 20-59 2.30 | 60- 14.5 |  |  |  | <0.0001 |
Mundt, 2007 | Daily consumption | Current | M, F | 1-9 2.1 | 10-19 2.3 | 20- 3.5 | Â | Â | Â | NA |
 |  | Former | M, F | 1-9 1.3* | 10-19 1.7 | 20- 2.4 |  |  |  | NA |
Dietrich, 2007 | Daily consumption | Current | M | 1-4 1.4 | 5-14 1.9 | 15-24 2.3 | 25-34 2.7 | 35-44 2.9 | 45- 3.0 | NA |