John Clemens’s research while affiliated with Agence Régionale de Santé (ARS) and other places

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Publications (58)


Restaurant Food Consumption by US Adults, What We Eat in America, NHANES 2017-2018
  • Technical Report
  • Full-text available

September 2022

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37 Reads

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2 Citations

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John C Clemens

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Alanna Moshfegh
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Saturated Fat and Food Intakes of Adults: What We Eat in America, NHANES 2017-2018

May 2022

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116 Reads

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3 Citations

www.ars.usda.gov/nea/bhnrc/fsrg 43 • One-third of adults, 20+years, met the dietary guidelines recommendation for saturated fat by consuming <10 percent of daily calories from saturated fat. • Adults who met the recommendation had 7.4 % and the adults who did not meet had 13.9 % of daily calories from saturated fat.



Sociodemographic characteristics of U.S. adults by sex and age, What We Eat in America, National Health and Nutrition Examination Survey (WWEIA, NHANES) 2013-2016 1 .
Mean daily energy intake differences by restaurant reporting status, sex, and intake day for U.S. adults age 20+, WWEIA, NHANES 2013-2016 1 .
Mean daily energy intakes by self-described intake, sex, and intake day for U.S. adults age 20+, WWEIA, NHANES 2013-2016 1 .
Mean daily energy intake by sex, age, and intake day for U.S. adults age 20+, WWEIA, NHANES 2013-2016 1 .
Mean daily energy intake by sociodemographic characteristics, sex, age, and intake day for U.S. adults age 20+, WWEIA, NHANES 2013-2016 1 .

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Comparing Two Days of Dietary Intake in What We Eat in America (WWEIA), NHANES, 2013–2016

July 2021

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277 Reads

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22 Citations

The objective of this research is to compare the Day 1 and Day 2 dietary intakes of adults in What We Eat in America, National Health and Nutrition Examination Survey (WWEIA, NHANES) 2013–2016. Dietary recalls of males (n = 2599) and females (n = 2624) 20+ years who had both a Day 1 and Day 2 recall and reported their intake as usual on both days in WWEIA, NHANES 2013–2016 were examined. Mean (±SE) energy intake for males was 2425 ± 26 kcal for Day 1 and 2334 ± 32 kcal for Day 2 (p = 0.004). For females, 1832 ± 18 kcal and 1775 ± 26 kcal were reported for Day 1 and 2, respectively (p = 0.020). There were no significant differences between energy intake on Day 1 and Day 2 within males and females by ten-year age groups. Comparing 20 year age groups for males and females by race/ethnicity (non-Hispanic White, non-Hispanic Black, non-Hispanic Asian, and Hispanic) and income (<131%, 131–350%, and >350% of poverty level) also showed no significant differences in energy intake between Day 1 and Day 2. Mean energy intake of adults was not statistically different between the two days of recall by sex, race/ethnicity or income within selected age groups. Overall, the difference in energy intake was less than 4% for both males and females.


Estimated Protein Intake From Animal and Plant Foods by U.S. Adults, What We Eat in America, NHANES, 2015–2016

June 2021

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69 Reads

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11 Citations

Current Developments in Nutrition

Objectives The 2020–2025 Dietary Guidelines for Americans encourage varying protein intake to include both animal foods and plant foods for the range of nutrients provided. The objective of this study is to estimate proportions of adults’ protein intake from animal and plant sources and the contribution of foods to each. Methods One day dietary intake data of adults 20+ years (N = 5017) in What We Eat in America (WWEIA), NHANES 2015–2016 were used. Proportions of protein intake from animal and plant sources were estimated from the ingredients for the foods in the Food and Nutrient Database for Dietary Studies (FNDDS) 2015–2016. Single ingredient foods such as chicken or beans were classified as 100% animal or plant, respectively. Proportions from multi-ingredient foods were determined from the amounts of animal and plant food ingredients in each item. If ingredients were not specified, the proportions from a similar food were applied. The proportions were applied to the dietary intakes to determine the population intake of protein from animal and plant sources. The WWEIA food categories were used to describe contribution of foods to animal and plant protein intake. Results Animal and plant foods accounted for 67% and 33% of total protein intake, respectively. Excluding mixed dishes, animal protein intake was contributed by dairy products (14%); meats (12%); poultry (16%); seafood (6%); cured meats (8%); and eggs (6%). Mixed dishes contributed 31% of animal protein intake. Protein from plant foods, excluding mixed dishes, was contributed by grains (24%); plant-based protein foods including legumes (4%), nuts and seeds (7%) soy products (1%); vegetables (9%); and fruit (2%). Mixed dishes accounted for 30% of plant protein intake; snacks and sweets contributed 14%. Conclusions Although protein intake from animal sources is relatively diverse, encouraging greater variety of protein intake from plant-based protein foods appears warranted. Funding Sources ARS-USDA.


Restaurant Dining and Energy Intake Among Adults in the U.S., What We Eat in America, NHANES 2015–2018

June 2021

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31 Reads

Current Developments in Nutrition

Objectives Restaurant dining is an important component of the meal patterns of many Americans. Portion sizes, preparation techniques and menu offerings as well as the social aspect of restaurant dining may influence food choices and energy intake at restaurant occasions. The objective of this study is to describe the frequency of restaurant dining among U.S. adults (restaurant reporters) and its contribution to energy intake compared to those who did not report a restaurant occasion (non-reporters). Methods One day of dietary intake data of adults 20 + years (N = 9759; 4722 males, 5037 females) in What We Eat in America, NHANES 2015–2018) were used. Comparisons within age, sex and day of the week were made by t-test. Results were considered significant at P < 0.001. Results On the intake day, 53% of adults reported dining at a restaurant. On weekdays (Monday through Thursday), 48% ate at a restaurant, and on weekends (Friday through Sunday), 60% ate at a restaurant. By age, restaurant dining was reported by 62% of those 20–39 years, 54% of those 40–59 years, and 41% of those 60+ years. Frequency of reporting a restaurant occasion was similar by race/ethnicity and increased with income. Energy intake of restaurant reporters vs non-reporters was 2625 vs 2255 among males (P < 0.001) and 2571 vs 2466 kcal (P < 0.001) among females. Energy intake among restaurant reporters was significantly higher than non-reporters regardless of day of the week. Overall, restaurant food accounted for 46% of reporters’ total energy intake: 44% on weekdays and 48% on weekends. Differences in percentages consuming alcohol between restaurant reporters (26%) and non-reporters (21%) were not significantly different. Conclusions These results indicate that consumption of restaurant foods by adults is associated with higher energy intake. Since restaurant dining is common among adults, efforts to encourage healthy choices and reasonable portions at restaurants could have a beneficial impact on overall energy intake of restaurant patrons. Funding Sources ARS-USDA.






Citations (34)


... Male adults in the United States consume, on average, about 2.7 L of beverages or approximately 11.5 cups a day, of which at least half (1.6 L, or 6.8 cups) is water, according to the 2017-2018 NHANES report. 1 Beverages contribute to about 17% of daily energy intake, but the effect that beverages can have on health outcomes is frequently underestimated. Habitual consumption of sugar-sweetened beverages (SSBs) or artificially sweetened beverages (ASBs) is associated with a greater incidence of type 2 diabetes, adiposity, and metabolic syndrome. ...

Reference:

The association of men's beverage intake with semen quality and assisted reproduction outcomes in patients undergoing fertility treatment
Beverage Choices among Adults: What We Eat in America, NHANES 2017-2018

... Added sugars intake from specific sources was then determined for a select beverage group comprising soft drinks, fruit drinks (first two digits of WWEIA subgroup 72) and coffee and tea (WWEIA subgroup 73), as the beverages contributing the most to added sugars (soft drinks and fruit drinks) [11] or those whose contribution to added sugars has increased over time (coffee and tea) [20]. Added sugars intake was also determined for other sources of added sugars that have been associated, either positively or negatively, with diet quality: RTEC (first two digits of WWEIA subgroup 46) [13]; flavored milk (first two digits of WWEIA subgroup 12) [21]; sweet bakery products (cakes and pies, cookies and brownies, doughnuts, sweet rolls, pastries) (first two digits of WWEIA subgroup 55) [22]; and snack/meal bars (cereal bars, nutrition bars) (first two digits of WWEIA subgroup 54) [23]. ...

Beverage Choices among Children: What We Eat in American, NHANES 2017-2018

... The mean total sugars, added sugars, and sucrose intake observed in 24-h recalls in our population were lower than those reported from NHANES (total sugars 108 g, and added sugars 54.8 g in males aged 55+) [37,38] even among vegetarians (average added sugar intake in NHANES vegetarians 63.2 ± 4.4 g vs. AHS-2 vegetarians 49.91 ± 30.40 g see Supplementary Table S5) [39]. Such intake differences may be reflective of low total dietary energy intake. ...

Added Sugars Intake of Americans: What We Eat in America, NHANES 2013-2014

... [70][71][72][73][74] For instance, in 2017e2018, more than 50% of US adults reported consuming meals from full-or quick-service restaurants on any given day. 75 Therefore, our results should be interpreted with caution. Fourth, examining the effects of total sugars intake on dietary quality is challenging given that fruits, vegetables, some dairy products, and grains have naturally occurring sugars, which do not contribute toward the 10% threshold of added sugars recommended by the Dietary Guidelines for Americans. ...

Restaurant Food Consumption by US Adults, What We Eat in America, NHANES 2017-2018

... The average protein consumption in 20-39 years old women in the United States is 73 grams/day 16 (NAHNES 2015-16) which is far beyond the recommended amount (46 g/day for women ages 19-70þ years). 16 Moreover, despite increased protein requirements during pregnancy (71 g/day), the average daily protein consumption in 20-40 years old pregnant women in the United States was higher compared with non-pregnant women (81.9 g and 71.4 g, respectively). ...

Protein Intake of Adults What We Eat in America, NHANES 2015-2016

... (2) Only 12 percent of adults in 2019 met the USDA's fruit intake recommendation and only 10 percent met the vegetable recommendation. (3)(4)(5) Moreover, while current USDA guidelines recommend keeping added sugars (typically found in processed foods) to less than 10 percent of daily calorie intake, the typical U.S. diet includes more than 13 percent, with sugar-sweetened beverages (SSBs) accounting for approximately 35 percent of those added sugars. (2) Poor dietary quality, such as inadequate fruit and vegetable (FV) intake, has been linked to weight gain, obesity, and obesity-related diseases that pose significant risks to public health. ...

Intake of Vegetables by Adults, What We Eat in America, NHANES 2017-2018

... However, only about one-third of US adults meet this recommendation, with adherence even lower among non-Hispanic White Americans-less than onefourth-compared to higher rates observed in Asian, Black, and Hispanic Americans. 46 Our study sample, predominantly non-Hispanic White Americans, reflects these adherence patterns, with 34.2% (n=50) meeting the USDA guideline of less than 10% of calories from saturated fat. This observed gap in adherence aligns with general population trends and underscores the broader goal for Americans to improve their diet quality, particularly among groups with lower adherence rates, such as non-Hispanic White Americans. ...

Saturated Fat and Food Intakes of Adults: What We Eat in America, NHANES 2017-2018

... Nutrient intake data was obtained from the NHANES dietary interview [30]. The underlying methods have been described earlier in detail [31][32][33]. We exclusively focused on nutrients from foods and beverages. ...

Comparing Two Days of Dietary Intake in What We Eat in America (WWEIA), NHANES, 2013–2016

... A meta-analysis of cohort studies found that adults who consume high-quality diets have a 22% lower risk of T2D and CVD compared with those who consume low-quality diets (8). Diet quality for the US population, and changes over time, have been evaluated for whites, African Americans, and Hispanics (4,(12)(13)(14)(15), and most recently, also among some East Asian and Pacific Islander subgroups (4,(16)(17)(18). However, little is known about diet quality among South Asians in the United States and how it compares with other racial/ethnic groups. ...

Nutrient Intakes and Eating Patterns of U.S. Adults by Race/Ethnicity
  • Citing Article
  • April 2015

The FASEB Journal

... There is some evidence that our participants may have over-reported fruit/vegetable intake; on average, participants reported that fruits and vegetables made up one third of their total daily food intake. This finding is inconsistent with estimates, based on nationally representative dietary surveys, that a majority of adults do not meet USDA dietary recommended five daily servings of fruits and vegetables (e.g.,Bowman, Friday, Clemens, & Moshfegh, 2015;Moore & ...

Vegetables, Fruit, and Whole Grains Consumption by U.S. Adults at Meals and Snacks: WWEIA, NHANES 2011‐12
  • Citing Article
  • April 2015

The FASEB Journal