Tibetan & Han Adolescent Activity: Study on Xizang
Okay, here’s a breakdown of the key information from the provided text, organized for clarity.this focuses on the methods used in the study:
1. Physical Activity (PA) Measurement:
Method: Accelerometers were used to objectively measure physical activity.
Cut-Points: Specific cut-points (thresholds for different activity intensities) were used to categorize activity levels.these cut-points were based on previous research ([21]) and have been shown to be reliable and valid for use wiht children and adolescents ([22]).
Temporal segmentation: PA data was analyzed across four time segments:
Weekdays vs. Weekends
School Hours vs. Out-of-School Hours
Middle School: School hours were 9:00-18:00. Out-of-school hours were 18:00-24:00 and 0:00-9:00.
High School: School hours were 8:00-22:00. Out-of-school hours were 22:00-24:00 and 0:00-8:00.
Time Zone Note: Despite being in a different geographical time zone, the study area uses Beijing Standard Time. Researchers accounted for this by noting that local rest schedules are adjusted to daylight patterns.
2. Body mass Index (BMI) Measurement:
Height: Measured using a stadiometer, barefoot, with standardized posture instructions. Recorded to one decimal place in centimeters (±0.5 cm tolerance).
weight: Measured using a calibrated weighing platform, barefoot, with standardized posture instructions. Recorded to one decimal place in kilograms (±0.1 kg accuracy).
Calculation: BMI was calculated using the standard formula: BMI = Weight (kg) / Height (m)²
3. Socioeconomic Status (SES) Assessment:
Method: A questionnaire was used to gather information on:
parental Education Level
Parental Occupation
Household Income
Reference: The questionnaire method is based on work by Guo et al. (citation provided).* Availability: The questionnaire itself is available in Supplementary Document 1.
Let me know if you’d like me to elaborate on any specific aspect of these methods, or if you have other questions about the text!