Rosenkranz et al. BMC Public Health 2010, 10:81 http://www.biomedcentral.com/1471-2458/10/81 Page 8 of 13 Table 3 Girl Scout troop meeting time in physically active content (4,280 minutes total observed time) Total minutes active content Total observed minutes Percent of minutes in active content Mean minutes active content per meeting Intervention Troops INT-1 INT-2 INT-3 mean Control Troops CON-1 CON-2 CON-3 CON-4 mean 99 131 175 135 0 8 30 10 12 824 562 566 650.7 394 585 742 607 582 12.0 23.3 30.9 20.7* 0 1.4 4.0 1.6 2.1* 14.1 18.7 25.0 19.3 0 1.1 4.3 1.4 1.7 Note: INT = intervention troop; CON = control troop; *Significant difference by condition, x2 = 210.8, p < .001 physical activity or healthful eating (X2 = 1168.70, p < .001), and more likely to have leaders discouraging physi- cal activity (X2 = 4.64, p = .031) and healthful eating (X2 = 5.88, p = .015). Finally, there was an insignificant trend for higher levels of family connection content (X2 = 3.09, p = .079) in intervention troops. Individual-level outcomes Accelerometer-Measured Physical Activity Figure 2 displays accelerometer-measured physical activ- ity levels of attending girls by condition. Girls in inter- vention troops accumulated significantly less sedentary (X2 = 6.3, p = .011), significantly more moderate (X2 = 8.2, p = .004), and moderate-to-vigorous physical activity (X2 = 18.4, p < .001), than girls in control troops. Based on mixed-model analyses of accumulated minutes of MVPA, there were no significant differences by weight status (F1, 400 = 0.45, p = .50), by socio-economic status (F1, 400 = 1.86, p = .173), or by race/ethnicity (F1, 400 = 0.01, p = .924). There were no significant interactions between intervention and these categorical variables (F1, 400 = 0.01 to 0.21, p = .648 to .919). Table 6 displays the adjusted mean scores at times 1 and 2, for intervention and control conditions. There were significant differences by condition at Time 1 for parent physical activity level and girl FV consumption. More parents in the intervention troops reported MVPA sufficient to meet recommended standards (X2 = 8.87, p = .002). At time 1, girls in the intervention troops reported significantly higher intakes of FV (F1, 73 = 8.2, p = .005). No other variables differed significantly prior to randomization. All analyses of child outcomes are based on sample of 72 participants completing mea- sures at times 1 and 2. Drop outs were low (n = 4, all from family relocation) and unrelated to troop assign- ment or the study. Body Mass Index The intra-class correlation coefficient assessing the troop-level variance associated with our primary out- come variable was low (ICC = .025). Mixed-model ana- lysis on difference scores (T2 minus T1) revealed there were no significant main intervention effects for girl BMI z-scores (F1, 5 = 0.42, p = .544); or Parent BMI (F1, 5 = 1.58, p = .264). There was a significant main effect of socio-economic status on parent BMI (F1, 35 = 6.74 p = .014). Lower socio-economic status parents increased more than three BMI units from time 1 to time 2. Influences on Body Mass Index, Girl Table 6 displays the adjusted mean scores at times 1 and 2, for intervention and control conditions. Mixed- model analysis on difference scores revealed no signifi- cant main intervention effects for: Girl FV servings (F1, 5 = 1.54, p = .269); Girl MVPA (F1, 5 = 0.09, p = .779); Girl SSB consumption (F1, 5 = 0.41, p = .549); or Girl eating with TV, (F1, 5 = 0.63, p = .463). The analysis did reveal a significant main effect of socio-economic status on girl PA (F1, 50 = 8.18, p = .006). Lower socio-eco- nomic status girls decreased in PA from time 1 to time 2 across conditions. Influences on Body Mass Index, Parent Table 6 displays adjusted mean scores at times 1 and 2, for intervention and control conditions. Mixed-model analysis on difference scores revealed no significant main intervention effects for: Parent FV consumption (F1, 5 = 1.94, p = .223); Parent eating with TV (F1, 5 = 1.55, p = .269); Parent MVPA (F1, 5 = 0.87, p = .393); and Parent SSB consumption. This analysis revealed a significant main effect of socio-economic status on par- ent FV consumption (F1, 5 = 5.51, p = .023). Lower socio-economic status parents increased FV consump- tion by two servings from time 1 to time 2 across condi- tions. There was a significant main effect of