Validity of a telephone-administered 24-hour dietary recall in telephone and non-telephone households in the rural Lower Mississippi Delta region.
OBJECTIVE
To determine if 24-hour dietary recall data are influenced by whether data are collected by telephone or face-to-face interviews in telephone and non-telephone households.


METHODS
Dual sampling frame of telephone and non-telephone households. In telephone households, participants completed a 24-hour dietary recall either by face-to-face interview or telephone interview. In non-telephone households, participants completed a 24-hour dietary recall either by face-to-face interview or by using a cellular telephone provided by a field interviewer.


METHODS
Four hundred nine participants from the rural Delta region of Arkansas, Louisiana, and Mississippi.


METHODS
Mean energy and protein intakes.


METHODS
Comparison of telephone and non-telephone households, controlling for type of interview, and comparison of telephone and face-to-face interviews in each household type using unpaired t tests and linear regression, adjusting for gender, age, and body mass index.


RESULTS
Mean differences between telephone and face-to-face interviews for telephone households were -171 kcal (P = 0.1) and -6.9 g protein (P = 0.2), and for non-telephone households -143 kcal (P = 0.6) and 0.4 g protein (P = 1.0). Mean differences between telephone and non-telephone households for telephone interviews were 0 kcal (P = 1.0) and -0.9 g protein (P = 0.9), and for face-to-face interviews 28 kcal (P = 0.9) and 6.4 g protein (P = 0.5). Findings persisted when adjusted for gender, age, and body mass index. No statistically significant differences were detected for mean energy or protein intake between telephone and face-to-face interviews or between telephone and non-telephone households.


CONCLUSIONS
These data provide support that telephone surveys adequately describe energy and protein intakes for a rural, low-income population.
Delta NIRI, Three Financial Centre, 900 S. Shackleford, Ste. 200, Little Rock, AR 72211, USA.
M
M
Bogle
J
J
Stuff
L
L
Davis
I
I
Forrester
E
E
Strickland
P H
PH
Casey
D
D
Ryan
C
C
Champagne
B
B
McGee
K
K
Mellad
E
E
Neal
S
S
Zaghloul
K
K
Yadrick
J
J
Horton
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D015930:Diet Records; D002149:Energy Intake; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007407:Interviews as Topic; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D008922:Mississippi; D011203:Poverty; D015203:Reproducibility of Results; D012424:Rural Population; D012959:Socioeconomic Factors; D013689:Telephone