9 Our results also have implications for evaluating adherence in an exercise trial such as the LIFE Study, for making decisions on what constitutes valid data for participants, and in establishing national exercise guidelines for older adults.
The correlation for MET hours per week of moderate or vigorous activity was strong (r=0.62), suggesting that the questionnaire is reasonably valid for ranking participants.
A single estimate of treatment effect calculated for a large population can be misleading if it is thought to be valid for all participants, as shown in our work.
However, ranking should be more valid for ordering participants with high rather than low exposures, because most of the ∑PCBs and ∑TEQs that were composed of a large proportion of congeners < LOD fell into the lower ranks.
Cognition Categories): Attention, Evaluation, Rule, Explanation, Action pharmacological treatment, Action non-pharmacological treatment, Action other, Want of information, Rating (valid for the ten participants with an additional rating task) and Other.
Data for participants with valid days are described in the analyses below (n = 34; 50% female).
The statistical analysis described below was performed on the ERP components isolated in the first block of experiments for participants with valid data.
For participants with valid responses (10) to a dietary questionnaire (n = 13,690; 75% of study population), we additionally adjusted for alcohol, fruit, vegetable, and red meat intakes and use of a multivitamin.
Psychometric properties of the brief ACR-SLE battery and the CB were evaluated and indicate that the ACR-SLE battery is valid for research in depressed participants with SLE.
Differences in baseline characteristics for participants with any valid data for ≥2 time points (n=990) and the remaining baseline sample (n=1074) not providing valid data at either follow-up were tested using t tests or χ tests.
