Authors assessed factors associated with the perceived dose of intervention received and with the participant satisfaction in a school-based obesity prevention intervention. The study explored the variance in the dose of intervention received that was at the school level. Process evaluation data from a school-based intervention study conducted in Oslo, Norway, in 2007-2009 were used. A total of 542 11-year-olds from 12 intervention schools were included. A web-based questionnaire was used to collect data. Descriptive analyses and multilevel regression analyses were conducted.

Results:

• Females and those with medium (vs. low) parental education had higher odds of reporting a high vs. low dose of intervention received at mid-way (8 months after baseline).
• Perceived social capital and perceived social support for physical activity from friends at baseline were positively associated with the dose of intervention received at mid-way.
• Perceived social capital at mid-way was positively associated with the dose of intervention reported post-intervention (20 months after baseline).
• Around 20% of the variance in the perceived dose of intervention received was at the school level.
• Satisfaction with the intervention was high overall and higher for females for several intervention components at mid-way and at post-intervention.