Cancer

Objectives:
The etiology of cancer type may vary significantly due to anatomy, embryology and physiology of the cancer site. Although the association between potato consumption and colorectal cancer (CRC) was summarized in a 2018 meta-analysis of 5 cohort studies, however, no meta-analysis has evaluated potato consumption in relation to multiple cancer sites in adults. Therefore, this review article has been conducted.

Objectives:
Controversial results of the association between green tea consumption and risk for esophageal cancer (EC) were reported by previous meta-analysis. Therefore, this review article (meta-analysis) has been conducted.

Does green tea consumption reduce esophageal cancer risk?

Study design:
This review article included 14 studies with a total of 5,057 esophageal cancer cases among 493,332 participants.

Objectives:
Does mushroom dietary intake reduce risk of cancer at any site?

Study design:
This review article included 11 case-control studies and 6 cohort studies.

Results and conclusions:
The investigators found higher mushroom consumption significantly reduced total cancer with 34% [pooled RR for the highest compared with the lowest consumption groups = 0.66, 95% CI = 0.55 to 0.78, n = 17].

Objectives:
Due to the rapid increase of primary liver cancer incidence and the poor prognosis, it is imperative to identify new modifiable factors such as diet and nutrition for the prevention of liver cancer. Diet high in saturated fatty acids (SFA) has been hypothesized to be associated with increased risk of cancers. However, the associations between dietary fatty acids and liver cancer are not consistent. Therefore, this review article has been conducted.

Objectives:

Objectives:
Systematic reviews of case-control studies evaluating the relationship between dietary salt intake and gastric cancer showed a positive association, however a quantitative analysis of longitudinal cohort studies is lacking. Therefore, this review article has been conducted.

Does a high salt intake increase gastric cancer risk?

Study design:
This review article contained 10 cohort studies with 268,718 participants, of which 1,474 gastric cancer events and a follow-up of 6-15 years.

Objectives:
The influence of dietary fat upon breast cancer mortality remains largely understudied despite extensive investigation into its influence upon breast cancer risk. Therefore, this review article has been conducted.

Does higher total fat or saturated fat dietary intake increase risk of breast-cancer-specific death (breast cancer mortality) among women?

Study design:
This review article included 15 prospective cohort studies investigating total fat and/or saturated fat intake (g/day) and breast cancer mortality.

Objectives:
Even though many studies have examined the possible effect of low-fat diet on breast cancer survival, the relationship remains unclear. Therefore, this review article has been conducted.

Does low-fat diet reduce risk of recurrence of breast cancer?

Study design:
This review article included 2 randomized controlled trials (RCTs) and 1 large multi-center prospective cohort study with 9,966 breast cancer patients.

Objectives:
Systemic inflammation and oxidative stress (OS) are associated with breast cancer. Coenzyme Q10 (CoQ10) as an adjuvant treatment with conventional anti-cancer chemotherapy has been demonstrated to help in the inflammatory process and oxidative stress. Therefore, this review article has been conducted.

Objectives:
Does guarana supplementation reduce cancer-related fatigue?

Study design:
This review article included 7 RCTs with a total of 427 cancer patients.
Some studies presented a low risk of bias for all the categories.
Meta-analysis was conducted for 3 studies about breast cancer, which presented sufficient data.

The instruments used to analyze fatigue were the Brief Fatigue Inventory (BFI), the Chalder Fatigue Scale, the Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-FATIGUE) and the Piper Scale.