Calcium supplementation reducing the risk of hypertensive disorders of pregnancy and related problems: A meta-analysis of multicentre randomized controlled trials

2015 ◽  
Vol 21 ◽  
pp. 19-31 ◽  
Author(s):  
Li-bin An ◽  
Wen-tao Li ◽  
Tie-nan Xie ◽  
Xin Peng ◽  
Bo Li ◽  
...  
Keyword(s):  
Randomized Controlled Trials ◽  
Calcium Supplementation ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Hypertensive Disorders Of Pregnancy ◽  
Randomized Controlled ◽  
Hypertensive Disorders

scholarly journals Calcium supplementation for improving bone density in lactating women: a systematic review and meta-analysis of randomized controlled trials

2020 ◽  
Vol 112 (1) ◽  
pp. 48-56
Author(s):  
Guoqi Cai ◽  
Jing Tian ◽  
Tania Winzenberg ◽  
Feitong Wu
Keyword(s):  
Systematic Review ◽  
Clinical Trials ◽  
Randomized Controlled Trials ◽  
Calcium Intake ◽  
Calcium Supplementation ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Controlled Trials ◽  
Lactating Women ◽  
Randomized Controlled

ABSTRACT Background Clinical trials evaluating the effect of calcium supplementation on bone loss in lactating women have been small, with inconsistent results. Objectives We aimed to determine the effect of calcium supplementation on bone mineral density (BMD) in lactating women. Methods An electronic search of databases was conducted from inception to January 2020. Two authors screened studies, extracted data, and assessed the risk of bias of eligible studies. Percentage change in BMD was pooled using random-effects models and reported as weighted mean differences (WMDs) with 95% CIs. Risk of bias was assessed using the Cochrane risk of bias tool. Results Five randomized controlled trials including 567 lactating women were included. All had a high risk of bias. Mean baseline calcium intake ranged from 562 to 1333 mg/d. Compared with control groups (placebo/no intervention), calcium supplementation (600/1000 mg/d) had no significant effect on BMD at the lumbar spine (WMD: 0.74%; 95% CI: −0.10%, 1.59%; I2 = 47%; 95% CI: 0%, 81%; n = 527 from 5 trials) or the forearm (WMD: 0.53%; 95% CI: −0.35%, 1.42%; I2 = 55%; 95% CI: 0%, 85%; n = 415 from 4 trials). BMD at other sites was assessed in single trials: calcium supplementation had a small to moderate effect on total-hip BMD (WMD: 3.3%; 95% CI: 1.5%, 5.1%) but no effect on total body or femoral neck BMD. Conclusions Overall, the meta-analysis indicates that calcium supplementation does not provide clinically important benefits for BMD in lactating women. However, there was adequate dietary intake before supplementation in some studies, and others did not measure baseline calcium intake. Advising lactating women to meet the current recommended calcium intakes (with supplementation if dietary intake is low) is warranted unless new high-certainty evidence to the contrary from robust clinical trials becomes available. More research needs to be done in larger samples of women from diverse ethnic and racial groups. This systematic review was registered at www.crd.york.ac.uk/prospero as CRD42015022092.

scholarly journals A systematic review of the effects of calcium supplementation on body weight

2006 ◽  
Vol 95 (6) ◽  
pp. 1033-1038 ◽  
Author(s):  
Rebecca Trowman ◽  
Jo C. Dumville ◽  
Seokyung Hahn ◽  
David J. Torgerson
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Body Weight ◽  
Randomized Controlled Trials ◽  
Dairy Products ◽  
Human Subjects ◽  
Calcium Supplementation ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Randomized Controlled

Animal studies and epidemiological studies have suggested that Ca supplementation (with Ca supplements or dairy products) may be associated with weight loss in human adults. We aimed toassess whether any association was present by reviewing relevant randomized controlled trials in human subjects. The study was a systematic review and subsequent meta-analysis of randomized controlled trials that used Ca supplementation as an intervention in persons 18 or more years of age, and that reported body weight as a final outcome. A total of thirteen randomized controlled trials were included in the meta-analysis. There was no association between the increased consumption of either Ca supplements or dairy products and weight loss after adjusting fordifferences in baseline weights between the control and intervention groups (P=0·19 and 0·85, respectively). We therefore concluded that Ca supplementation has no statistically significant association with a reduction in body weight.

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