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Cancer was estimated to kill 9.
There is increasing evidence that the risk of various types of cancer is reduced in the peri-Mediterranean population, mainly due to the high intake of olive oil as the main vegetable fat, plant-based foods and fish, and the moderate consumption of white meat, eggs, dairy products and alcohol
, these studies assessed the relationship between olive oil consumption and cancer risk or prognosis, ultimately aiming to determine the role of olive oil intake in cancer prevention and survival
Ultimately 45 studies were included in the meta-analysis; 37 were case-controls (17,369, 28,294 controls) and 8 were cohort studies (929,771 participants totaling 12,461)
[47], 1 [77], 3[37, 61, 72], 6[41]60 62 64 73 74 [41, 64], 1 [57], 1 [43], 9[33, 45, 46, 48, 52, 56, 65, 69, 70[53], [36])
The overall meta-analysis included 45 eligible studies; 37 were case-controls (17,369, 28,294 controls) and 8 were cohort studies (12,461 in a cohort of 929,771 subjects).
Figure 2 Table 1 The highest olive oil intake group was associated with a 31% lower likelihood of developing any type of cancer (RR = 0.
The protective effect of high olive oil intake on cancer risk was also reflected in a subset of case-control studies (37 study groups, RR = 0.
Table 1 Figure 2 Table 1 Protective associations involving multiple studies,
A post hoc subgroup analysis showed that in the Mediterranean diet setting (9 study groups, RR = 0.
A post hoc subgroup analysis showed that in the Mediterranean diet setting (9 study groups, RR = 0.
Table 1 Figure 3
2.
Table 1 Figure 4
3.
Subgroup analyses by site in
4.
Notably, a combined analysis of urinary tract cancer showed a relative risk of 0.
Table 2 presents the results of the meta-regression analysis
.
No effect on overall and gastrointestinal cancer risk was observed when mean age was studied
.
Likewise, the year of publication did not change the overall decline in breast and gastrointestinal cancer rates associated with olive oil consumption
.
The protective effect of high olive oil intake on gastrointestinal cancer risk appeared to be more significant in men (index coefficient = 0.
94, 95%CI: 0.
89-1.
00) (S40 Figure S1 file)
.
Gender , on the other hand, did not alter the overall cancer risk association
.
.
No effect on overall and gastrointestinal cancer risk was observed when mean age was studied
.
Likewise, the year of publication did not change the overall decline in breast and gastrointestinal cancer rates associated with olive oil consumption
.
The protective effect of high olive oil intake on gastrointestinal cancer risk appeared to be more significant in men (index coefficient = 0.
94, 95%CI: 0.
89-1.
00) (S40 Figure S1 file)
.
Gender , on the other hand, did not alter the overall cancer risk association
.
Gender did not alter the overall cancer risk association
.
Taken together, the highest olive oil intake was associated with a 31% lower likelihood of any cancer (pooled RR = 0.
69, 95% CI: 0.
62-0.
77), breast (RR = 0.
67, 95% CI: 0.
52-0.
86), stomach Intestinal (RR = 0.
77, 95%CI: 0.
66-0.
89), upper aerodigestive tract (RR = 0.
74, 95%CI: 0.
60-0.
91) and urinary tract (RR = 0.
46, 95%CI: 0.
29-0.
72) risk reduction
.
Significant overall effects were present in both Mediterranean and non-Mediterranean participants, as shown by studies in all subgroups by multivariate and univariate analyses and by study quality
.
.
Taken together, the results of this meta-analysis represent valuable evidence for the protective effect of olive oil on cancer development
.
Additional prospective cohort studies of various cancer types (especially in non-Mediterranean regions), as well as large randomized trials, appear desirable to further understand the role of olive oil in cancer prevention
.
.
Additional prospective cohort studies of various cancer types (especially in non-Mediterranean regions), as well as large randomized trials, appear desirable to further understand the role of olive oil in cancer prevention
.
Taken together, the results of this meta-analysis represent valuable evidence for the protective effect of olive oil on cancer development
.
Additional prospective cohort studies of various cancer types (especially in non-Mediterranean regions), as well as large randomized trials, appear desirable to further understand the role of olive oil in cancer prevention
.
Original source:
Christos Markellos , et al.
Olive oil intake and cancer risk: A systematic review and meta-analysis.
PLOS ONE | https://doi.
org/10.
1371/journal.
pone.
0261649 January 11, 2022.
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