Use of dietary assessment tools in randomized trials evaluating diet-based interventions in pregnancy: a systematic review of literature.

PURPOSE OF REVIEW: Accurate assessment of dietary intake in interventional trials is the key to evaluate changes in dietary behaviour and compliance. We evaluated the use of dietary assessment tools in randomized trials on diet-based interventions in pregnancy by a systematic review. RECENT FINDINGS: We updated our previous search (until January 2012) on trials of diet and lifestyle interventions in pregnancy using Medline and EMBASE up to December 2015. Two independent reviewers undertook study selection and data extraction. We assessed the characteristics of dietary assessment tools, the timing and frequency of use and any validation undertaken.Two-thirds (39/58, 67%) of the included studies used some form of tools to assess dietary intake. Multiple days' food diaries were the most commonly used (23/39, 59%). Three studies (3/39, 8%) validated the used tools in a pregnant population. Three studies (3/39, 8%) prespecified the criteria for adherence to the intervention. The use of dietary assessment tools was not associated with study quality, year of publication, journal impact factor, type of journal and the study sample size. SUMMARY: Although self-reporting dietary assessment tools are widely used in interventional dietary trials in pregnancy, the quality and applicability of existing tools are low.

Influence of weaning timing advice and associated weaning behaviours in a survey of black and minority ethnic groups in the UK.

OBJECTIVE: To assess understanding of the Department of Health weaning guidelines and weaning influences in a self-selected sample of black and minority ethnic (BME) parents, residing in London. DESIGN: A face-to-face, questionnaire-facilitated survey among Black African, Black Caribbean and South Asian parents. SETTING: An opportunistic sample of parents was recruited from Sure Start centres, churches and play groups across key London boroughs. SUBJECTS: Three hundred and forty-nine interviews were included; 107 Black African, fifty-four Black Caribbean, 120 South Asian and sixty-four of Black mixed-race ethnicity. RESULTS: Fifty-two per cent of Black and 66 % of South Asian parents had accurate understanding of the guidelines. Inaccurate knowledge of the guidelines was associated with weaning before 17 weeks (P < 0·001); 36 % of Black Africans and 31 % of Black Caribbeans were weaned before 4 months compared with 16 % of South Asians. All BME groups were most influenced by weaning information from the previous generations of mothers in their families, which was associated with earlier weaning (21·5 (SD 6·5) v. 24·1 (SD 4·2) weeks; F(2,328) = 5·79, P = 0·003), and less so by professional infant feeding advice, which was associated with a later weaning age (23·7 (SD 5·1) v. 20·7 (SD 5·7) weeks; F(1,344) = 34·7, P < 0·001). CONCLUSIONS: Lack of awareness of the Department of Health weaning guidelines is common among these BME populations, whose weaning behaviour is strongly influenced by informal advice. Further research is necessary to elucidate the influences on weaning in these populations and to facilitate the development of infant feeding support which is salient for BME groups in the UK.

An online survey of knowledge of the weaning guidelines, advice from health visitors and other factors that influence weaning timing in UK mothers.

The UK weaning guidelines recommend the introduction of solid food at or around 6 months. The evidence suggests that knowledge of the guidelines is high, although only a small minority of parents wait until 6 months to wean. The aim of this study was to assess understanding of the UK weaning guidelines in a sample of UK parents and investigate the associations of this understanding with weaning timing, and in comparison to other influencing factors. This study conducted an online survey of UK parents. Eligible participants had weaned a child since the introduction of the current guidelines. Of 3607 participants, 86% accurately understood the guidelines. Eighty-seven per cent of health visitors were reported to have advised weaning at or around 6 months. Knowledge of the guidelines was associated with later weaning (independently of demographic factors) (P < 0.001) but did not ensure compliance: 80% of mothers who weaned before 24 weeks and 65% who weaned before 17 weeks were aware of the guidelines. Younger mothers (P < 0.001), those receiving benefits (P < 0.001), those educated only to 16 (P < 0.001) and minority ethnic groups (P < 0.001) had lower levels of awareness. Poor understanding of the guidelines was the most reliable predictor of early weaning (P = 0.021) together with young maternal age (P = 0.014). Following the baby-led weaning approach was the most reliable predictor of those weaning at 26 weeks, together with the Internet being the most influential source of advice. Understanding of the current weaning guidelines is high and is a key independent predictor of weaning age in this population.

Sources of weaning advice, comparisons between formal and informal advice, and associations with weaning timing in a survey of UK first-time mothers.

OBJECTIVE: The aim of the present study was to explore knowledge of the UK weaning guidelines and the sources of weaning advice used by UK first-time mothers. DESIGN: An online survey of UK parents; analysed using mixed methods. SETTING: Participants were recruited from a selection of parenting websites that hosted a link to the survey. SUBJECTS: In total, 1348 UK first-time mothers were included in the analysis. RESULTS: Knowledge of the guidelines was high (86 %) and associated with later weaning (P < 0·001), although 43 % of this sample weaned before 24 weeks. The majority of parents used multiple sources of information, the most influential being the health visitor (26 %), the Internet (25 %) and books (18 %). Fifty-six per cent said they received conflicting advice. Younger mothers and those of lower educational attainment were more likely to be influenced by advice from family, which was likely to be to wean earlier. Furthermore, those most influenced by their mother/grandmother were less likely to have accurate knowledge of the guidelines. In this population the Internet was used for weaning advice across all sociodemographic groups and was associated with a later weaning age, independently of sociodemographic factors (P < 0·001). Data from responses to a free-text question are used in illustration. CONCLUSIONS: The study suggests that first-time mothers have a good understanding of the weaning guidelines but seek weaning information from multiple sources, much of which is conflicting. Informal sources of weaning advice appear most influential in younger mothers and those of lower educational attainment, and result in earlier weaning.