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Dietary Reference Intakes for Calcium and Vitamin D (2011)

Chapter: Appendix E: Literature Search Strategy

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Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
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E
Literature Search Strategy

In order to review the most relevant scientific literature available, the committee and staff regularly conducted thorough searches of several online bibliographic data bases, including Medline, Science Direct, and WorldCat/First Search. General searches on vitamin D, calcium, and health outcomes were first conducted to identify primary literature. Using the results of the primary search, key search terms were developed and secondary searches were then conducted. Search terms were also chosen based on relevance to the report outline and topics included in the previous IOM report (IOM, 1997). Although initial searches were general, subsequent searches focused on retrieving studies that were not covered by the evidence-based reviews conducted by AHRQ-Ottawa (Cranney et al., 2007) and AHRQ-Tufts (Chung et al., 2009). Similar to the methodology used by the AHRQ reports searches were limited to English. As the study progressed, focused searches were conducted as needed and general searches were carried out to identify newly published articles. See Box E-1 for an example of how searches were conducted.

Page 1014 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×

TABLE E-1 Sample Search History for Literature Published After AHRQ-Tufts

Number

Searches

Results

1

exp Vitamin D/

34296

2

(25-hydroxy vit D or plasma vit D or 25OHD or 25-OHD)

956

3

(25OHD3 or “25(OH)D3” or 25-OHD3 or “25-(OH)D3”).tw.

1205

4

(“25(OH)D” or “25-(OH)D” or “25-OH-D”).tw.

1696

5

25-hydroxycholecalciferol.tw.

877

6

25-hydroxyergocalciferol.tw.

27

7

calcidiol.tw.

227

8

Calcifediol/

2443

9

(vit adj (d or d2 or d3)).mp.

244

10

Ergocalciferols/

2050

11

Ergocalciferol$.tw.

322

12

Cholecalciferol/

4499

13

Cholecalciferol$.tw.

1172

14

calciferol.tw.

363

15

or/1-14

35253

16

exp Calcium/

218026

17

exp Calcium Carbonate/ or exp Calcium Citrate/ or exp Calcium Phosphates/ or exp Calcium Malate/

24264

18

exp Calcium, Dietary/

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (7533)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (515)

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (7533)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (515)

8048

19

calcium.tw.

250569

20

or/16-19

373131

21

15 or 20

392115

22

21 and (200905* or 200906* or 200907* or 200908*).ed.

3840

23

limit 22 to english language [Limit not valid in CCTR; records were retained]

3544

24

limit 23 to humans [Limit not valid in CCTR; records were retained]

1906

Page 1015 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×

Number

Searches

Results

25

limit 24 to (addresses or bibliography or biography or comment or congresses or consensus development conference or consensus development conference, nih or dictionary or directory or duplicate publication or editorial or in vitro or interview or lectures or letter or news or newspaper article or “review”) [Limit not valid in CCTR; records were retained]

443

26

24 not 25

1463

27

randomized controlled trial.pt.

537352

28

controlled clinical trial.pt.

156124

29

randomized controlled trials/

62621

30

Random Allocation/

85834

31

Double-blind Method/

187602

32

Single-Blind Method/

21457

33

clinical trial.pt.

729105

34

Clinical Trials.mp. or exp Clinical Trials/

268451

35

exp Clinical Trial/

587643

36

(clinic$ adj25 trial$).tw.

218792

37

((singl$ or doubl$ or trebl$ or tripl$) adj (mask$ or blind$)).tw.

214271

38

Placebos/

46595

39

placebo$.tw.

225224

40

random$.tw.

736338

41

trial$.tw.

569938

42

(latin adj square).tw.

3500

43

Comparative Study.tw.

55680

44

exp Evaluation studies/

140739

45

Follow-Up Studies/

421249

46

Prospective Studies/

316292

47

(control$ or prospectiv$ or volunteer$).tw.

2441089

48

Cross-Over Studies/

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and

Ovid MEDLINE(R) <1950 to Present> (24638)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (18713)

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (24638)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (18713)

43351

Page 1016 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×

Number

Searches

Results

49

or/27-48

3820192

50

49 and 26

551

51

21

392115

52

limit 51 to english language [Limit not valid in CCTR; records were retained]

351480

53

limit 52 to yr=“2009—2010”

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (8085)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (89)

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (8085)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (89)

8174

54

limit 53 to humans [Limit not valid in CCTR; records were retained]

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (2956)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (89)

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (2956)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (89)

3045

55

remove duplicates from 54

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (2751)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (3)

Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations and Ovid MEDLINE(R) <1950 to Present> (2751)

EBM Reviews—Cochrane Central Register of Controlled Trials <3rd Quarter 2009> (3)

2754

Page 1017 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×

REFERENCES

Chung M., E. M. Balk, M. Brendel, S. Ip, J. Lau, J. Lee, A. Lichtenstein, K. Patel, G. Raman, A. Tatsioni, T. Terasawa and T. A. Trikalinos. 2009. Vitamin D and Calcium: A Systematic Review of Health Outcomes. Evidence Report No. 183. (Prepared by the Tufts Evidence-based Practice Center under Contract No. HHSA 290-2007-10055-I.) AHRQ Publication No. 09-E015. Rockville, MD: Agency for Healthcare Research and Quality.

Cranney A., T. Horsley, S. O’Donnell, H. A. Weiler, L. Puil, D. S. Ooi, S. A. Atkinson, L. M. Ward, D. Moher, D. A. Hanley, M. Fang, F. Yazdi, C. Garritty, M. Sampson, N. Barrowman, A. Tsertsvadze and V. Mamaladze. 2007. Effectiveness and Safety of Vitamin D in Relation to Bone Health. Evidence Report/Technology Assessment No. 158. (Prepared by the University of Ottawa Evidence-based Practice Center (UO-EPC) under Contract No. 290-02-0021.) AHRQ Publication No. 07-E013. Rockville, MD: Agency for Healthcare Research and Quality.

IOM (Institute of Medicine). 1997. Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: National Academy Press.

Page 1018 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×

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Page 1013 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×
Page 1013
Page 1014 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×
Page 1014
Page 1015 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×
Page 1015
Page 1016 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×
Page 1016
Page 1017 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×
Page 1017
Page 1018 Cite
Suggested Citation:"Appendix E: Literature Search Strategy." Institute of Medicine. 2011. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press. doi: 10.17226/13050.
×
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Calcium and vitamin D are essential nutrients for the human body. Establishing the levels of these nutrients that are needed by the North American population is based on the understanding of the health outcomes that calcium and vitamin D affect. It is also important to establish how much of each nutrient may be "too much."

Dietary Reference Intakes for Calcium and Vitamin D provides reference intake values for these two nutrients. The report updates the DRI values defined in Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride, the 1997 study from the Institute of Medicine. This 2011 book provides background information on the biological functions of each nutrient, reviews health outcomes that are associated with the intake of calcium and vitamin D, and specifies Estimated Average Requirements and Recommended Dietary Allowances for both. It also identifies Tolerable Upper Intake Levels, which are levels above wish the risk for harm may increase. The book includes an overview of current dietary intake in the U.S. and Canada, and discusses implications of the study. A final chapter provides research recommendations.

The DRIs established in this book incorporate current scientific evidence about the roles of vitamin D and calcium in human health and will serve as a valuable guide for a range of stakeholders including dietitians and other health professionals, those who set national nutrition policy, researchers, the food industry, and private and public health organizations and partnerships.

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