Prostate cancer risk: Data about the relation with prostate cancer risk was provided by 2 cohorts. No association was found.
Prostate cancer mortality: No data was found.
Conclusion: No evidence was found for an association between convolvulaceae and prostate cancer.
| Author | Cohort name | Subjects | Years of follow-up | Cases | End point | Consumption of | Relative Risk (RR) | Adjustments |
| 13) Tseng M (2004) | The National Health and Nutrition Examination Survey Epidemiological Follow-up Study (NHANES) I Epidemiological Follow-up Study (NHEFS) | 3,779 men aged 25-74. (USA) | 1982-84 to 1992 | 136? | Invasive prostate cancer incidence (excluding in situ cases) | Sweet potatoes or yellow yams | No association with prostate cancer risk (results not shown). | ? |
| 7) Giovannucci E (1995) | The Health Professionals Follow-Up Study. | 47,894 men aged 40-75. (USA) | 1986-1992 | 753 | Prostate cancer risk (non-stage A1) | Yams or sweet potatoes |
RR = 0.83 (0.56-1.23; P = 0.18) for the highest vs lowest quartile of consumption. Amount specific data (servings): 0: RR = 1. 1-3/mo: RR = 0.93 (0.80-1.09). 1/wk: RR = 0.86 (0.66-1.11). ≥ 2/wk: RR = 0.83 (0.56-1.23). | Age and energy. |