Evidence map›Paper›PMID 8179947›Full record

ArticleThe British journal of general practice : the journal of the Royal College of General Practitioners1994

Effect of changes in maternal smoking habits in early pregnancy on infant birthweight.

P Frank, R McNamee, P C Hannaford, C R Kay

Abstract read
In one paragraph

Article in The British journal of general practice : the journal of the Royal College of General Practitioners, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.6field-weighted citation impact, top 30% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed, 8 citations in OpenAlex.

  1. Article
  2. Preconception care: who needs it, who wants it, and how should it be provided?The British journal of general practice : the journal of the Royal College of General Practitioners · 1998
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

P FrankRoyal College of General Practitioners Manchester Research Unit.
R McNamee
P C Hannaford
C R Kay
Royal College of General Practitioners · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe inverse relationship between maternal smoking and infant birthweight is well documented.

aimThe aim of the present study was to examine whether a change in maternal cigarette consumption in early pregnancy affects the infant's birthweight.

methodA total of 5980 women who presented to their general practitioners between 1976 and 1979 with an unplanned pregnancy and the babies resulting from these pregnancies were included in the study. Women were divided into four categories: non-smokers, smokers, quitters and reducers.

resultsIn terms of mean infant birthweight, the non-smokers had a clear benefit over the smokers whose babies were 153 g lighter (P < 0.001), and over the quitters whose infants were 39 g lighter. There was also an advantage in stopping smoking: the smokers had babies whose mean birthweight was 120 g less than that of the quitters (P < 0.001). There was no demonstrable benefit from reducing cigarette consumption without entirely stopping.

conclusionThese findings may have important implications for where best to target health education.

Indexed as

PregnancyAttitude to HealthBirth WeightFemaleHumansInfant, NewbornPregnancy OutcomeSmoking

Identifiers

PMID8179947
PMCPMC1238784
OpenAlexW179867427

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.