J-shapedness: an often missed, often miscalculated relation: the example of weight and mortality

被引：22

作者：

Cao, Sissi ^{[1
]}

Moineddin, Rahim ^{[2
,3
]}

Urquia, Marcelo L. ^{[4
]}

Razak, Fahad ^{[5
,6
,7
]}

Ray, Joel G. ^{[8
,9
,10
]}

机构：

[1] Univ Western Ontario, Schulich Sch Med & Dent, London, ON, Canada

[2] Univ Toronto, Dept Family & Community Med, Toronto, ON M5S 1A1, Canada

[3] Univ Toronto, Inst Clin Evaluat Sci, Toronto, ON M5S 1A1, Canada

[4] Univ Toronto, Li Ka Shing Knowledge Inst, Dalla Lana Sch Publ Hlth, St Michaels Hosp, Toronto, ON, Canada

[5] St Michaels Hosp, Div Gen Internal Med, Toronto, ON M5B 1W8, Canada

[6] St Michaels Hosp, Li Ka Shing Knowledge Inst, Keenan Res Ctr, Toronto, ON M5B 1W8, Canada

[7] Univ Toronto, Dept Med, Toronto, ON, Canada

[8] Univ Toronto, St Michaels Hosp, Dept Med, Toronto, ON M5B 1W8, Canada

[9] Univ Toronto, St Michaels Hosp, Dept Obstet & Gynecol, Toronto, ON, Canada

[10] Univ Toronto, St Michaels Hosp, Dept Hlth Policy Management & Evaluat, Toronto, ON, Canada

来源：

JOURNAL OF EPIDEMIOLOGY AND COMMUNITY HEALTH | 2014年 / 68卷 / 07期

关键词：

BODY-MASS INDEX; ALL-CAUSE MORTALITY; LONG-TERM MORTALITY; DWELLING OLDER-ADULTS; SELF-RATED HEALTH; MIDDLE-AGED WOMEN; LIFE-STYLE; FOLLOW-UP; RISK-FACTORS; FRACTIONAL POLYNOMIALS;

D O I：

10.1136/jech-2013-203439

中图分类号：

R1 [预防医学、卫生学];

学科分类号：

1004 ; 120402 ;

摘要：

We present three considerations in analysing the association between weight and mortality, as well as other relations that might be non-linear in nature. First, authors must graphically plot their independent and dependent variables in a continuous manner. Second, authors should assess the shape of that relation, and note its shape. If it is non-linear, and specifically, J-shaped or U-shaped, careful consideration should be given to using the `best' statistical model, of which multivariate fractional polynomial regression is a reasonable choice. Authors should also refrain from truncating their data to avoid dealing with non-linear relations.

引用

页码：683 / 690

页数：8

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