Fish consumption and risk of myeloma: a meta-analysis of epidemiological studies

Wang, Yazhu; Wu, Qi‐Jun; Zhu, Jingjing; Wu, Lang

doi:10.1007/s10552-015-0625-1

Cited by 22 publications

(12 citation statements)

References 47 publications

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“…Data extracted from each study included: the first author’s name, publication year, study country, study design, characteristics of study population (sample size, age, length of follow-up, measures and numbers of parity, and association effect sizes). If more than 1 estimate were reported, we used the estimate that was adjusted for the most appropriate covariates, like the previous studies 38 39 40 41 42 . In situations where only unadjusted estimates were provided, we used the crude estimate in the analysis.…”

Section: Methodsmentioning

confidence: 99%

Parity and endometrial cancer risk: a meta-analysis of epidemiological studies

et al. 2015

Sci Rep

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The association between parity and endometrial cancer risk is inconsistent from observational studies. We aimed to quantitatively assess the relationship by summarizing all relevant epidemiological studies. PubMed (MEDLINE), Embase and Scopus were searched up to February 2015 for eligible case–control studies and prospective studies. Random-effects model was used to pool risk estimations. Ten prospective studies, 35 case-control studies and 1 pooled analysis of 10 cohort and 14 case-control studies including 69681 patients were identified. Pooled analysis revealed that there was a significant inverse association between parity and risk of endometrial cancer (relative risk (RR) for parous versus nulliparous: 0.69, 95% confidence interval (CI) 0.65–0.74; I2 = 76.9%). By evaluating the number of parity, we identified that parity number of 1, 2 or 3 versus nulliparous demonstrated significant negative association (RR = 0.73, 95% CI 0.64–0.84, I2 = 88.3%; RR = 0.62, 95% CI 0.53–0.74, I2 = 92.1%; and RR = 0.68, 95% CI 0.65–0.70, I2 = 20.0% respectively). The dose-response analysis suggested a nonlinear relationship between the number of parity and endometrial cancer risk. The RR decreased when the number of parity increased. This meta-analysis suggests that parity may be associated with a decreased risk of endometrial cancer. Further studies are warranted to replicate our findings.

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Section: Methodsmentioning

confidence: 99%

Parity and endometrial cancer risk: a meta-analysis of epidemiological studies

et al. 2015

Sci Rep

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“…No studies were excluded based on publication status, sample size or length of follow-up. In situations when multiple publications involving same individuals were detected, we used only the study with the largest number of patients, like previous studies [21–24]. …”

Section: Methodsmentioning

confidence: 99%

Breastfeeding and thyroid cancer risk in women: A dose-response meta-analysis of epidemiological studies

Zhu

et al. 2016

Clinical Nutrition

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Background & Aims The association between breastfeeding and thyroid cancer risk is not consistent from epidemiological studies. To better clarify the association including assessing a potential dose-response relationship, we conducted a comprehensive meta-analysis. Methods We searched PubMed (MEDLINE) up to November 2015 for prospective studies or case-control studies that evaluated the association between breastfeeding and risk of thyroid cancer. Effect estimates were pooled using a fixed-effects model. Results Nine reports (2 prospective studies, 6 case-control studies and 1 pooled analysis of 14 case-control studies) involving 2423 cases and 350081 non-cases were identified. After pooling relevant studies, there was a significant inverse association between ever breastfeeding and risk of thyroid cancer (RR=0.91, 95% CI 0.83–0.99), with minor heterogeneity (I2=10.1%). The dose-response analysis revealed a significant linear relationship between the duration of breastfeeding and risk of thyroid cancer. The summary RR for an increment of 1 month of breastfeeding with risk of thyroid cancer was 0.983 (95% CI 0.98–0.99). When focusing on cohort studies, a more prominent linear dose-response relationship was detected, with the combined RR for every increment of 1 month of breastfeeding to be 0.965 (95% CI 0.96–0.97). Conclusions This meta-analysis suggests that breastfeeding is potentially inversely associated with thyroid cancer risk. Also longer duration of breastfeeding may further decreases thyroid cancer risk. If validated in large-scale prospective studies, our findings may have implications for impacting women’s decision in breastfeeding.

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“…Studies were included regardless of publication status, sample size and length of follow‐up. If multiple publications from the same study were identified, we included the study with the largest number of cases and most relevant information, like previous studies .…”

Section: Methodsmentioning

confidence: 99%

Parity and thyroid cancer risk: a meta‐analysis of epidemiological studies

Zhu

et al. 2015

Cancer Medicine

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Although observational studies have assessed the relationship between parity and thyroid cancer risk, the findings are inconsistent. To quantitatively assess the association, we conducted a systematic review and meta‐analysis. PubMed and Embase were searched up to January 2015. Prospective or case–control studies that evaluated the association between parity and thyroid cancer risk were included. We used the fixed‐effects model to pool risk estimates. After literature search, 10 prospective studies, 12 case‐control studies and 1 pooled analysis of 14 case‐control studies including 8860 patients were identified. The studies had fair methodological quality. Pooled analysis suggested that there was a significant association between parity and risk of thyroid cancer (RR for parous versus nulliparous: 1.09, 95% CI 1.03‐1.15; I2=33.4%). The positive association persisted in almost all strata of subgroup analyses based on study design, location, study quality, type of controls, and confounder adjustment, although in some strata statistical significance was not detected. By evaluating the number of parity, we identified that both parity number of 2 versus nulliparous and parity number of 3 versus nulliparous demonstrated significant positive associations (RR=1.11, 95% CI 1.01‐1.22; I2=31.1% and RR=1.16, 95% CI 1.01‐1.33; I2=19.6% respectively). The dose‐response analysis suggested neither a non‐linear nor linear relationship between the number of parity and thyroid cancer risk. In conclusion, this meta‐analysis suggests a potential association between parity and risk of thyroid cancer in females. However, the lack of detection of a dose‐response relationship suggests that further studies are needed to better understand the relationship.

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Fish consumption and risk of myeloma: a meta-analysis of epidemiological studies

Cited by 22 publications

References 47 publications

Parity and endometrial cancer risk: a meta-analysis of epidemiological studies

Parity and endometrial cancer risk: a meta-analysis of epidemiological studies

Breastfeeding and thyroid cancer risk in women: A dose-response meta-analysis of epidemiological studies

Parity and thyroid cancer risk: a meta‐analysis of epidemiological studies

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