Table 5.
Multiple Regression Analyses for Identification of Factors Associated with Physical Activity Measured by Accelerometry at the Waist Site
| Model 1 N = 97 |
Model 2 N = 90 |
Model 3 N = 89 |
Model 4 N = 87 |
|
|---|---|---|---|---|
| B (SE) | B (SE) | B (SE) | B (SE) | |
| Intercept | 9749.4 (7430.0) | 2281.3 (8227.8) | 3034.9 (8656.0) | 3697.5 (10,975.0) |
| Motor development | ||||
| Locomotion raw score | 516.5 (143.9)** | 511.8 (149.7)** | 510.7 (151.7)** | 391.0 (179.4)* |
| Stationary raw score | 571.5 (234.4)* | 549.6 (242.6)* | 529.0 (246.9)* | 406.5 (274.0) |
| Age infant first rolled over (months) | −1564.0 (959.7) | −635.1 (1003.0) | −761.5 (1027.1) | −1008.4 (1045.5) |
| Care setting | ||||
| Home | −711.2 (2417.6) | −890.0 (2452.1) | 449.3 (2681.5) | |
| Relative | −977.1 (3664.6) | −841.1 (3711.0) | 1239.6 (3955.8) | |
| Structured | Ref | Ref | Ref | |
| Resources used by infant in home | 971.5 (780.8) | 1031.0 (792.5) | 733.1 (853.9) | |
| Tummy time (min) | 73.8 (40.2)† | 76.8 (40.8)† | 77.0 (41.2)† | |
| Restrictive devices index (min/day) | 0.40 (9.3) | −0.12 (9.8) | ||
| Sex | ||||
| Males | 2378.9 (2343.0) | |||
| Race | ||||
| Non-Hispanic Black | −1651.8 (3292.0) | |||
| Hispanic | −1063.8 (3790.0) | |||
| Other | −8647.5 (5213.8) | |||
| Non-Hispanic White | Ref | |||
| Parent education | ||||
| Less than college | −361.8 (2764.5) | |||
| Older siblings | ||||
| No | 2949.4 (2728.6) | |||
| Age (weeks) | 279.3 (376.7) | |||
| BMI z-score (wt/ht2) | 86.8 (1037.6) | |||
| R 2 | 0.32 | 0.40 | 0.41 | 0.44 |
| Adjusted R2 | 0.31 | 0.35 | 0.35 | 0.35 |
*
p < 0.05, **p < 0.01, †p < 0.10.