Table 1. Baseline Characteristics Among 28 641 Students in Grades 3 to 7 From 79 California Schools.
| Variable | Enrolled students | Complete cases | ||||
|---|---|---|---|---|---|---|
| Group 1: BMI screening and reporting (n = 10 041) | Group 2: BMI screening only (n = 10 441) | Group 3: Control (n = 8159) | Total (N = 28 641) | Weight status analyses, groups 1 and 2, BMI ≥85th percentile (n = 6534)a | Weight stigmatization analyses, groups 1, 2, and 3; grades 4-7 (n = 14 318)b | |
| Sex, % | ||||||
| Male | 51.9 | 50.7 | 50.8 | 51.1 | 54.3 | 50.5 |
| Female | 48.1 | 49.3 | 49.2 | 48.9 | 45.7 | 49.5 |
| Race/ethnicity, % | ||||||
| Hispanic | 56.9 | 62.9 | 56.3 | 58.9 | 70.2 | 58.0 |
| Asian | 17.8 | 10.7 | 17.5 | 15.1 | 9.7 | 17.6 |
| African American | 5.2 | 9.6 | 7.8 | 7.5 | 5.2 | 6.2 |
| White | 16.9 | 14.9 | 14.6 | 15.5 | 12.8 | 15.1 |
| Other | 3.2 | 2.0 | 3.8 | 2.9 | 2.1 | 3.0 |
| Grade, % | ||||||
| 3 | 40.0 | 35.3 | NA | 26.9 | 36.6 | NA |
| 4 | 22.1 | 19.6 | 43.4 | 27.3 | 20.7 | 35.7 |
| 5 | 9.2 | 8.7 | 9.2 | 9.0 | 9.1 | 12.2 |
| 6 | 16.3 | 22.0 | 22.3 | 20.1 | 20.2 | 28.6 |
| 7 | 12.4 | 14.5 | 25.0 | 16.8 | 13.5 | 23.6 |
| BMI z score, mean (SD)c | 0.57 (1.16) | 0.65 (1.14) | NA | 0.61 (1.15) | 1.17 (0.43) | 0.61 (1.15) |
| BMI ≥85th percentile, %c | 38.5 | 40.6 | NA | 39.6 | 100 | 40.1 |
| Perceived weight status, %d | ||||||
| Underweight | 21.7 | 21.5 | 22.5 | 22.0 | 12.2 | 21.8 |
| About the right weight | 52.9 | 51.4 | 50.6 | 51.5 | 39.9 | 51.7 |
| Somewhat overweight | 20.1 | 22.2 | 21.0 | 21.1 | 38.3 | 21.4 |
| Very overweight | 5.4 | 4.9 | 5.9 | 5.4 | 9.6 | 5.1 |
| School district, % | ||||||
| 1 Northern California | 25.4 | 9.8 | 17.9 | 17.5 | 20.0 | 21.4 |
| 2 Central California | 17.7 | 20.8 | 29.3 | 22.2 | 20.9 | 21.4 |
| 3 Southern California | 13.2 | 24.1 | 2.7 | 14.2 | 18.1 | 11.6 |
| 4 Southern California | 18.3 | 29.9 | 30.1 | 25.9 | 23.8 | 22.2 |
| 5 Southern California | 25.4 | 15.4 | 20.0 | 20.2 | 17.2 | 23.5 |
| School-level FRPM eligibility, % | 64.4 | 72.5 | 68.3 | 68.4 | 69.5 | 67.6 |
Abbreviations: BMI, body mass index; FRPM, free and reduced-price meal; NA, not applicable.
a
Complete cases for weight status: students in groups 1 and 2 with valid baseline BMI in the 85th percentile or higher and 1 valid follow-up BMI.
b
Complete cases for weight stigmatization: students in grades 4 to 7 at baseline with complete survey data at baseline and at 1 follow-up period.
c
Values restricted to students with a valid baseline BMI (n = 8458); BMI was not assessed in group 3.
d
Values restricted to students in grades 4 to 7 who completed surveys; grade 3 students did not complete surveys.