IPAQ interview version: convergent validity with accelerometers and comparison of physical activity and sedentary time levels with the self-administered version.
Bibliographic record
Abstract
AIM: This study aimed to assess convergent validity of International Physical Activity Questionnaire (IPAQ) interview (long form, last seven days), and to examine differences in reported physical activity and sedentary time between the self-administered and interview versions of the long IPAQ (last seven days); and whether these differences depend on gender, age, educational level and weight status. METHODS: In total, 542 Belgian adults (45.3% male, 43.8±12.1 years) completed the IPAQ self-administered version. Data of these adults were compared with data of 542 adults (45.2% male, 43.5±12.3 years) who completed the IPAQ interview version and wore an accelerometer for seven consecutive days. Samples were matched on gender, age, education, neighborhood characteristics and time of data collection. RESULTS: Convergent validity of the IPAQ interview version was moderate for total physical activity (Spearman ρ=0.37, P<0.001) and high for sedentary time (Spearman ρ=0.67; P<0.001). Bland-Altman plots showed that systematic and proportional biases were present for total physical activity; for sedentary time only systematic bias was present. Adults who completed the self-administered IPAQ reported higher means for most types of physical activity and less sedentary time than those who completed the IPAQ interview version. Differences between the two IPAQ versions were larger in males, lower-educated, older and overweight/obese adults. CONCLUSION: Convergent validity of assessing total physical activity using IPAQ interview was similar to previous studies examining validity of the IPAQ, but stronger results were found for sedentary time. In general, and especially in males, lower-educated, older and overweight/obese adults, the use of the IPAQ interview version assessed by trained researchers, should be recommended to collect self-reported data on physical activity and sedentary time.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".