Biomedical subjects

Marilyn Johnson-Kozlow

Publications and source records attributed to Marilyn Johnson-Kozlow.

5 recordsLinked to original sources

PubMed2006

Comparative validation of the IPAQ and the 7-Day PAR among women diagnosed with breast cancer.

BACKGROUND: The criterion-related validity and measurement bias of the long form of the International Physical Activity Questionnaire (IPAQ) was compared to the 7-Day Physical Activity Recall (PAR). METHODS: Participants were women who have been diagnosed with breast cancer and enrolled in the ongoing Women's Healthy Eating and Living Study. Women (N = 159, average age 57 years) wore an accelerometer for one week and then completed the IPAQ or the PAR. RESULTS: The validity correlation of the PAR was significantly higher (p < 0.001) than the IPAQ (0.73 vs. 0.33, respectively). The PAR and IPAQ overestimated total physical activity by 13% vs. 247%, respectively. The PAR had better sensitivity (p = 0.14) and specificity (p < .01) than the IPAQ (100% vs. 71% and 84% vs. 59%, respectively) in predicting attainment of the ACSM physical activity guideline. CONCLUSION: The PAR was superior to the IPAQ in terms of validity, measurement bias, and screening statistics.

Journal Article↗

PubMed2006

Recall strategies used by respondents to complete a food frequency questionnaire: an exploratory study.

The purpose of this study was to identify strategies used to recall dietary intake on a food frequency questionnaire by adults in a multiethnic sample. One-on-one interviews were conducted to identify strategies used to recall intake on the Fred Hutchinson Food Frequency Questionnaire. Twenty-eight men and 26 women in San Diego, CA (average age, 41 years), were recruited from the general community with approximately equal numbers of non-Hispanic white, African-American, and English- and Spanish-speaking Hispanic participants. Recall of food intake was most commonly guided by routines. Recall strategies differed primarily by food type and not by ethnic or sex groups. Each of nine food categories on the questionnaire was associated with a distinct pattern of recall strategies. The recall strategies identified in this study may serve as cues to be included on food frequency questionnaires to aid recall and thus improve accuracy of self-reported dietary intake.

Adult↗

PubMed2006

Using recall cues to improve measurement of dietary intakes with a food frequency questionnaire in an ethnically diverse population: an exploratory study.

OBJECTIVE: Intakes of foods based on responses to a revised food frequency questionnaire (FFQ) and the original Fred Hutchinson FFQ were compared. Revisions included the addition of foods (eg, corn tortillas), disaggregation of line items (eg, cookies vs cakes), replacing unfamiliar terms in the Spanish-language version, a food glossary, and written cues to help respondents recall their food intake. DESIGN: Adult men (46%) and women (n=105) of non-Hispanic African-American, Hispanic, and non-Hispanic white background (age range 30 to 60 years) completed two FFQs within a 1-month reference period. Participants were randomly assigned to receive the revised FFQ or Fred Hutchinson FFQ first. Primary outcome measures were frequency rates weighted by portion size for 34 foods and beverages. ANALYSES: Frequencies of food intake on the original and revised FFQs were estimated using robust means and compared using the Wilcoxon signed rank test. RESULTS: Significantly greater (P<0.05) dietary recall was obtained on the revised FFQ, on items in which foods were added or disaggregated, on traditionally Hispanic foods among Hispanic participants, and foods listed in the glossary. CONCLUSIONS: Revisions in the Fred Hutchinson FFQ resulted in significantly greater dietary recall. Despite increased length, participants believed that the food glossary and written cues were helpful in completing the revised FFQ.

Acculturation↗

PubMed2004

What respondents recall about walking and what self-report items elicit about walking.

BACKGROUND: Research on the cognitive processing of survey questions suggests that the distribution of walking bouts (e.g., mean, skew) may influence retrospective self-report responses. METHODS: Undergraduate women (N = 209) kept a weekly log of their walking behavior, then responded to four different self-report measures of walking [National Health Interview Survey (NHIS), Context, Fuzzy-Typical, and Fuzzy-Maximum]. The logs were evaluated to determine which walking characteristics best summarized their walking behavior. Principal components analysis yielded three components of walking behaviors: Frequency, Duration, and Maximum. Multiple regression was used to determine if the walking components differentially predicted the four self-report measures of walking. RESULTS: The Maximum walking component was a significant predictor of all self-report measures of walking. The Context score was also predicted by the Frequency Component. The Frequency and Duration walking components did not predict the NHIS or Fuzzy self-report measures independently of Maximum walking. CONCLUSIONS: Frequency-by-duration self-report measures of walking appear to be more sensitive to the maximum rather than the frequency or duration of walking behavior. Measurement of the frequency of bouts may be best accomplished by providing a framework of recall cues around which walks of different types occur.

Adult↗

PubMed2002

Coffee consumption and cognitive function among older adults.

This study examined the association of caffeinated and decaffeinated coffee intake with cognitive function in a community-based sample of older adults in 1988-1992. Participants were 890 women with a mean age of 72.6 years and 638 men with a mean age of 73.3 years from the Rancho Bernardo Study. Cognitive function was assessed by 12 standardized tests, and lifetime consumption and current coffee consumption were obtained by questionnaire. After adjustment for confounders, higher lifetime coffee consumption in women was associated with better (p < or = 0.05) performance on six of 12 tests, with a trend (p < or = 0.10) on two other cognitive function tests; current caffeinated coffee intake was associated with better performance on two tests (p < 0.05), with a trend (p < 0.10) on one other test. Among women aged 80 or more years, lifetime coffee intake was nonsignificantly associated with better performance on 11 of the 12 tests. No relation was found between coffee intake and cognitive function among men or between decaffeinated coffee intake and cognitive function in either sex. Lifetime and current exposure to caffeine may be associated with better cognitive performance among women, especially among those aged 80 or more years.

Adult↗