Table 1.
Baseline demographic characteristics and follow-up participation rates
| All | Dance & Screen Time Reduction | Health Education | |
|---|---|---|---|
| N | 261 | 134 | 127 |
| Age in years, mean (sd) | 9.4 (0.9) | 9.5 (0.9) | 9.4 (0.8) |
| Number of adults living in the household, mean (sd) | 1.9 (0.9) | 1.9 (1.0) | 1.9 (0.8) |
| Number of children living in the household, mean (sd) | 2.9 (1.5) | 2.9 (1.6) | 2.9 (1.4) |
| Families who own their own home, n (%) | 61(23%) | 29 (22%) | 32 (25%) |
| Parent/Caregiver marital status, n (%) | |||
| Single-Never Married | 122 (47%) | 64 (48%) | 58 (46%) |
| Divorced/Separated or Widowed | 62 (23%) | 30 (22%) | 32 (25%) |
| Married | 74 (28%) | 38 (28%) | 36 (28%) |
| Maximum household education level, n (%) | |||
| High School graduate or less | 71 (27%) | 38 (28%) | 33 (26%) |
| Some College/Technical School | 122 (47%) | 66 (49%) | 56 (44%) |
| College graduate | 68 (26%) | 30 (22%) | 38 (30%) |
| Annual total household income, n (%) | |||
| Refusal to respond | 4 (2%) | 2 (1%) | 2 (2%) |
| Less than $20,000 | 107 (41%) | 50 (37%) | 57 (45%) |
| $20,000–39,999 | 73 (28%) | 38 (28%) | 35 (28%) |
| $40,000–$59,999 | 48 (18%) | 28 (21%) | 20 (16%) |
| $60,000–$79,999 | 12 (5%) | 7 (5%) | 5 (4%) |
| $80,000 or more | 17 (7%) | 9 (7%) | 8 (6%) |
| TV in the girl’s bedroom, n (%) | 202 (77%) | 101 (75%) | 101 (80%) |
| Self-assessed breast maturation, n (%) | |||
| Refused | 3 (1%) | 2 (1%) | 1 (1%) |
| Stage 1 | 82 (31%) | 43 (32%) | 39 (31%) |
| Stage 2 | 86 (33%) | 43 (32%) | 43 (34%) |
| Stage 3 | 78 (30%) | 37 (28%) | 41 (32%) |
| Stage 4 | 9 (3%) | 6 (4%) | 3 (2%) |
| Stage 5 | 3 (1%) | 3 (2%) | . |
| Self-assessed pubic hair maturation, n (%) | |||
| Refused | 2 (1%) | 2 (1%) | . |
| Stage 1 | 111 (43%) | 59 (44%) | 52 (41%) |
| Stage 2 | 80 (31%) | 41 (31%) | 39 (31%) |
| Stage 3 | 40 (15%) | 18 (13%) | 22 (17%) |
| Stage 4 | 25 (10%) | 12 (9%) | 13 (10% |
| Stage 5 | 3 (1%) | 2 (1%) | 1 (1%) |
| Entered puberty (stage 2 or greater for breast and/or pubic hair), n (%) | 201 (77%) | 101 (75%) | 100 (79%) |
| Menarche | 8 (3%) | 4 (3%) | 4 (3%) |
| Body mass index percentile distributiona, n (%) | |||
| 0–24th percentile | 19 (7%) | 8 (6%) | 11 (9%) |
| 25–49th percentile | 33 (13%) | 21 (16%) | 12 (9%) |
| 50–74th percentile | 51 (20%) | 27 (20%) | 24 (19%) |
| 75–84th percentile | 25 (10%) | 12 (9%) | 13 (10%) |
| 85–94th percentile | 47 (18%) | 22 (16%) | 25 (20%) |
| ≥ 95th percentile | 86 (33%) | 44 (33%) | 42 (33%) |
| Reasons for missing Follow-up Visit 1 (FU1), n (%) | |||
| Unable to contact | 48 (18%) | 25 (18%) | 23 (18%) |
| Moved out of area | 1 (0%) | 1 (1%) | 0 (0%) |
| Unable to schedule within the desired time interval | 1 (0%) | 1(1%) | 0 (0%) |
| Refused assessments | 9 (3%) | 5 (4%) | 4 (3%) |
| Reason for missing Follow-up Visit 2 (FU2), n (%) | |||
| Unable to contact | 64 (25%) | 33 (25%) | 31 (24%) |
| Moved out of area | 3 (1%) | 2 (1%) | 1 (1%) |
| Unable to schedule within the desired time interval | 38 (15%) | 22 (16%) | 16 (13%) |
| Refused assessments | 10 (4%) | 3 (2%) | 7 (6%) |
| Reason for missing Follow-up Visit 3 (FU3), n (%) | |||
| Unable to contact | 56 (21%) | 33 (25%) | 23 (18%) |
| Moved out of area | 1 (0%) | 0 (0%) | 1 (1%) |
| Unable to schedule within the desired time interval | 63 (24%) | 40 (30%) | 23 (18%) |
| Refused assessments | 5 (2%) | 2 (1%) | 3 (2%) |
| Reason for missing Follow-up Visit 4 (FU4), n 0(%) | |||
| Unable to contact | 21 (8%) | 9 (7%) | 12 (9%) |
| Moved out of area | 9 (3%) | 3 (2%) | 6 (5%) |
| Unable to schedule within the desired time interval | 0 (0%) | 0 (0%) | 0 (0%) |
| Refused assessments | 1 (0%) | 1 (1%) | 0 (0%) |
| Withdrew from study | 5 (2%) | 3 (2%) | 2 (2%) |