Table 3 Summary of data sources and collection procedures
Outcomes | Data collection methods | Variables derived for analysis | Sample Size (% of eligible) |
|---|---|---|---|
Primary: Child | |||
BMIz Modified BMIz | Child height and weight measured in person by trained Head Start health services staff. We extracted the resulting data from administrative records. | BMIz calculated with the Centers of Disease Control and Prevention 20,000 growth charts [55] | 3750 children (93.5%) |
Secondary: Child | |||
Dietary intake [56, 57] (items = 5) Physical activity [58] (items = 2) Screen time [57] (items = 2) Night sleep duration [59] (items = 2) | Parents surveyed in person by trained Head Start health services staff via enrollment and/or home visit protocols. We extracted the resulting data from administrative records. | Responses dichotomized as meets recommendations (vs. does not): a. Consume vegetables, fruit & water multiple times per day [Note: measured via separate items (n = 3)] [60] b. Consume SSBs rarely or never [60] c. Consume juice no more than daily [60] d. Be physically active at least 60 minutes/day [61] e. Spend no more than 60 minutes/day on screen time [62] f, Sleep 10-13 hours per night [63] | 2332 children (58.1%) |
Weight-related parenting practices [34] (items = 10) Parental empowerment [47] (items = 15) | Parents self-reported survey responses. Trained bilingual research assistants recruited and offered assistance. | Composite score [1,2,3,4] calculated by averaging across all items [64,65,66,67,68,69]; higher scores indicate higher empowerment or healthier parenting practices | 955 parents (37.1%) |