Upload
phungnga
View
217
Download
4
Embed Size (px)
Citation preview
Chery Smith, PhD, MPH, RD
University of Minnesota
Department of Food Science and Nutrition
IOM Workshop on Food Insecurity & Obesity
November 18, 2010
In 1996-97 we collected data on
people using the Bread Basket
in Manhattan, KSWe found overweight and obesity was higher than the
national norm in that sample of people
Submitted a manuscript to Journal of the American Dietetic Association
A reviewer questioned the findings and asked, “How is that possible?”
It was converted to a “Brief” rather than an original research manuscript.
Bell M, Wilbur L, Smith C. Nutritional status of persons using a local emergency food system program in middle America. J Am Diet Assoc, 1998; 98 (9): 1031-1033.
So how can food insecure
people be obese?
The best way to answer this
question is to use qualitative
research methodology, coupled
with quantitative methodologies.
Using qualitative methodology allows the
investigator to:
TALK with people about an issue
Fill in gaps in the literature that are not
caught through quantitative methodologies
(surveys, measurements, etc.)
It provides FORMATIVE data for survey
development, marketing strategies, and
designing intervention projects
Qualitative Methodology Most
often used include:
Person-to-person interviews
Focus groups
Face-to-face interviewing:
Good for gathering sensitive information
Works well with children and adults and people from various ethnic background
Be sure to include an ice-breaker…something to relax the participant (ie. food models work well)
Requires a skilled and trained interviewer
Time consuming
Focus Group Methodology
Groups should have 4-8 people, depending on the topics to be discussed and the depth of information that you want to collect.
May need to be gender, race, or age-specific.
Avoid having relatives in the same group.
Moderator should be trained and skilled at keeping the conversation going and not allowing one individual to dominate the group.
Always have 2 moderators present. This helps maintain objectivity.
Use first names only and start with an ice-breaker.
Both methods use open-ended
questions
When collecting qualitative data on food
insecurity and obesity take your own
heights and weights after the meeting
(quantitative data)
Self-reported data is not recommended for low-income
groups because of usual over- and under- reporting,
but also because many do not own scales and don’t
know their weights.
Example of quantitative question
regarding food insecurity:
In the last 12 months, were you ever hungry but didn’t
eat because there wasn’t enough money for food?
Yes
no
don’t know
It says “yes” or “no” but not “how” or
“why”
Let’s go back to the food security
question….and ask qualitatively
Tell me about the food situation in your household. What happens when there isn’t enough money to buy food?
What strategies do you use to feed yourself and your family when food is low in the home?
How do you feed your children on days when food is short in the home? Where do you go? How do you select the meal site?
Data generated from a face to face child interview.
When children reported being hungry at night, we asked them to tell us what
happened:
As one child reported, “…I go to sleep and I dream about food that I’m eating…I
dream about ooh, ahhh, I dreamed about hamburgers and carrots and strawberries
and everything else… and then it makes me full when I get up..it makes me, I get, like,
and why do I have a tummy ache?!”
(Richards and Smith, Social Science Medicine: 2007:1577).
You can also ask questions about obesity
or body size
You’ve probably noticed that some people have larger bodies and others have smaller bodies….why do you think that happens?
Or
What do you think of your weight? What influences your body weight?
Do you worry about your weight? Why? Why not?
“it scares me a lot, but it’s still kinda hard to watch
what you eat…even though my brother and sister
passed away, because of their weight. You know I
don’t wanna watch my diet, it’s real hard to watch. I
mean especially when you have a taste for
something and I mean when your body wants it,
you’re just gonna go get it. I start out with a little bit,
then I’ll start eating and once I get into the routine of
eating and it tastes good, then I just keep on eating.
I’ll go OK, I gotta have some more, and then it’s like
oh man, I’m done, I gotta have some more. I just
keep going until I feel like I’m stuffed.”
Analyzing the data Remember that qualitative data cannot be analyzed in the same
way as quantitative data…subjective vs. objective
Qualitative data is an analysis of words, whereas quantitative data is an analysis of numbers.
Be systematic and disciplined in your coding and have two researchers code; this decreases the subjectivity of the data.
Code for ideas independently (you are extracting them from the discussion), then meet and resolve any coding discrepancies.
Look for trends and patterns, identify themes and sub-themes.
Achieve an appropriate “n”…saturation point
(Kruger, 1998)
Analyze the data
Do your analysis in a timely manner
Analysis should be verifiable (someone
else can come to the same conclusion)
Organize the data using NVIVO or another
ethnographic software. We use NVIVO.
Examine the data by body mass index
(BMI)/race/gender/age. Do heavy and lean
children think about food/physical
activity/weight in the same way?
What we’ve learned over time about children and
food insecurity and weight issues:
A history of food deprivation can lead to overeating and
obesity
Current hunger can lead to overeating when tasty food is
available (Smith and Richards, 2008; Richards and Smith, 2007)
55% of homeless youth reported not enough and eat and
25% reported going to bed hungry (Smith and Richards, 2008)
Homeless youth reported overeating, eating disliked food, eating anything,
and eating at friends homes as strategies to cope with food insecurity (Smith
and Richards, 2008)
Many youth reported unhealthy eating behavior because of the types of
foods available in the home (Dammann and Smith, 2010)
Youth reported night eating . Buffets are favored type of restaurant. School
lunches reported as “nasty” (Dammann and Smith, 2010).
The National School Lunch program expedites acculturation for migrant
children (Franzen and Smith, 2009).
From focus group data, models were created (Franzen and Smith, 2009; Richards and Smith, 2007)
What we’ve learned over time about adults and
food insecurity and weight issues:
Parents try to make sure children eat first (Richards and Smith,2006a and 2006b).
Adults have developed strategies to increase food security including: using food
assistance programs, shopping on Saturday when store food samples are plentiful,
overeating when tasty food is availability, shopping smart and thrifty, stealing and
dumpster diving when necessary, asking family and friends for cash/food, pawning items
for cash, selling food stamps, and overeating on Friday evenings at Soup kitchens
because many are closed on Saturday (Richards and Smith , 2006a and 2006b; Smith et al., 2010; Wiig
and Smith, 2009; Eikenberry and Smith, 2005) .
Not all adults want to lose weight; especially true for African American males (Smith and
Richards, in process)….so how can we work with this sample? They will be a challenge.
Different samples view weight differently…older Hmong perceive weight as having money
to eat, better survival in hard times…African Americans and Native Americans are
accepting of larger body sizes….many define “big” differently from Whites (Mulasi-Pokhriyal
and Smith, 2010; Franzen and Smith, 2009; Dammann and Smith, in press).
Both the food environment and personal determinants are important influencers of food
choice (Dammann and Smith, 2010; Dammann and Smith, 2009; Richards and Smith 2006a,b; Smith and Morton,
2009; Smith et al., 2010; Henderickson et al., 2006; Smith et al., 2009)
Food policies at homeless shelters influence eating (Smith et al., 2010; Richards and Smith,
2010; 2007; 2006)
Pop is not the only “problem” food, consumption of high fat meats, milks, and
fried foods contribute excessive calories (Dammann and Smith, 2010; Smith and Richards, in
process).
Quantitative Data Survey questions should be developed using formative data from focus
groups or interviews.
Example of questions created for a child’s survey (n=202 homeless youth 9-18 years) based on data from kid’s interviews (used a 5 pt Likert Scale..always true; kind of true; not sure; kind-of-not true; never true):
If I am hungry, I usually wait until the next meal to eat.
I overeat at mealtimes so I will not be hungry later on.
If I am hungry, I usually wait until the next meal to eat.
I overeat at mealtimes so I will not be hungry later on.
(Smith and Richards, Am J Hum Bio; 2008)
Publications on food insecure populations 1. Damman KW, Smith C. Food-related Environmental, Behavioral, and Personal Factors Associated with
Body Mass Index among Urban, Low-income, African American, American Indian, and Caucasian Women. Am J Health Promotion, 2010, in press.
2. Smith C, Morton LW. Rural Food Deserts: Low Income Perspectives on Food Access in Minnesota and Iowa. J Nutr Educ Behav., 2009, 41:171-187.
3. Dammann KW, Smith C. Food-related attitudes and behaviors at home, school, and restaurants: Perspectives from urban, multi-ethnic, low-income children in Minnesota. J Nutr Ed Behav, 2010; 42(6):389-397.
4. Richards R, Smith C. Investigation of the hunger-obesity paradigm among shelter-based homeless women living in Minnesota. J Hunger Environmental Nutrition, 2010, 5(3):339-359.
5. Dammann KW, Smith C. Race, homelessness, and other environmental factors associated with the food purchasing behavior of low-income women in Minnesota. J Am Diet Assoc, 2010;110(9):1351-1356.
6.Dammann KW, Smith C, Richards R. Low-income, racially diverse mothers’ perceptions of their 9-13 year-old children’s weight status, diet, and health. Maternal Child Health Journal, 2010, in press
7. Smith C, Butterfass J, Rickelle R. Environment influences food access and resulting shopping and dietary behaviors among homeless Minnesotans. Ag and Human Values, 2010, 27(2):141-161.
8. Wiig K, Smith C. The art of grocery shopping on a food stamp budget: Factors influencing the food choices of low-income women as they try to make ends meet. Pub Health Nutrition, 2009, 12 (10):1726-1734.
9. Dammann K, Smith C. Factors affecting low-income women’s food choices and the perceived impact of dietary intake and socioeconomic status on their health and weight. J Nutr Edu Behav. 2009, 41 (4):242-253.
10. Smith C, Klosterbuer A, Levine A. Military experience strongly influences post service eating behavior and BMI status in American veterans. Appetite. 2009, 52:280-289.
11. Smith C, Richards R. Dietary intake, overweight status, and perceptions of food insecurity among homeless Minnesotan youth. Am J Hum Bio. 2008, 20;550-563.
12. Smith C, Richards R*. Dietary intake, overweight status, and perceptions of food insecurity among homeless Minnesotan youth. Am J Hum Bio. 2008, 20;550-563.
13. Richards R, Smith C. Environmental, parental, and personal influences on food choice, access, and overweight status among homeless children. Soc Sci Med. 2007;65:1572-83.
Publications on food insecure populations
14. Henderickson D, Smith C, Eikenberry N. Low-income individuals face limited fruit and vegetable
access in four Minnesotan communities designated as food deserts. Ag and Human Values. 2006:
23(3):371-383.
15. Richards R, Smith C. Shelter environment and placement in community affects lifestyle factors
among homeless families in Minnesota. Am J Health Promotion, 2006; 21(1):36-44.
16.Eikenberry N, Smith C. Attitudes, beliefs and prevalence of dumpster diving as a means to obtain
food by Midwestern, low-income, urban dwellers. Ag and Hum Values, 2005; 22(2): 187-202.
17. Harala K, Smith C, Hassel C, Galfus P. New Moccasins: Articulating Research Agendas through
Interviews with Faculty and Staff at Native and Non-Native Academic Institutions. J Nutr Ed Behav,
2005; 37(2):67-76.
18. Eikenberry N, Smith C. Healthy eating: Perceptions, motivations, barriers, and promoters in low-
income Minnesota communities. J Am Diet Assoc. 2004;104 (7):1158-1161.
19. Verpi H, Smith C, Reicks M. A qualitative study comparing the needs of food shelf/pantry clients
with behaviors and attitudes of food donors. J Nutr Ed Behav, 2003; 35:6-16.
20. Lautenschlager L, Smith C. Beliefs, knowledge, and values held by inner-city youth about
gardening, nutrition, and cooking. Ag and Hum Values. 2007;24 (2):245-258.
21. Franzen L , Smith C. Differences in Stature, BMI, and Dietary Practices between US born and
Newly Immigrated Hmong Children. Soc Sci Med, 2009, 69:442-450.
22. Bell M, Wilbur L, Smith C. Nutritional status of persons using a local emergency food system
program in middle America. J Am Diet Assoc, 1998;98 (9): 1031-1033.
23. Reimer K, Smith C, Reicks M, Henry H, Atwell J, Thomas R. Child Feeding Strategies Relating to
Fruits and Vegetables According to Stage of Change in African American Women. Pub Health Nutr,
2004;7 (4):505-512