Table 4.
Multiple Regression Analyses for Identification of Factors Associated with Physical Activity Measured by Accelerometry at the Ankle Site
| Model 1 N = 112 |
Model 2 N = 104 |
Model 3 N = 103 |
Model 4 N = 100 |
|
|---|---|---|---|---|
| B (SE) | B (SE) | B (SE) | B (SE) | |
| Intercept | 81,759.6 (15,426.6)*** | 72,961.2 (16,234.8)*** | 71,745.5 (17,184.3)*** | 96,807.3 (20,202.0)*** |
| Motor development | ||||
| Locomotion raw score | 723.9 (316.5)* | 621.7 (313.1)† | 628.1 (317.5)† | 666.3 (329.8)* |
| Stationary raw score | −240.7 (493.6) | −307.0 (491.4) | −296.7 (499.9) | −288.5 (493.2) |
| Age infant first rolled over (months) | −3977.9 (2006.4)† | −1857.3 (2049.0) | −1827.8 (2095.3) | −970.5 (1928.1) |
| Care setting | ||||
| Home | −10,180.7 (4977.8)* | −10,142.5 (5054.1)† | −13,724.4 (5083.9)* | |
| Relative | −17,604.6 (7528.4)* | −17,645.1 (7615.4)* | −11,680.0 (7244.3) | |
| Structured | Ref | Ref | Ref | |
| Resources used by infant in home | 1806.2 (1579.2) | 1793.3 (1605.4) | 817.3 (1536.3) | |
| Tummy time (min) | 226.0 (85.5)** | 226.6 (86.9)* | 213.5 (79.9)* | |
| Restrictive devices index (min/day) | 4.6 (19.8) | −6.0 (18.9) | ||
| Sex | ||||
| Males | 4188.3 (4390.4) | |||
| Race | ||||
| Non-Hispanic Black | −19,953.4 (5888.5)** | |||
| Hispanic | 4555.0 (6609.1) | |||
| Other | −19,814.3 (10,336.9)† | |||
| Non-Hispanic White | Ref | |||
| Parent education | ||||
| Less than college | −1950.8 (5051.4) | |||
| Older siblings | ||||
| No | 5418.3 (5044.5) | |||
| Age (weeks) | −725.4 (674.5) | |||
| BMI z-score (wt/ht2) | −1262.1 (1896.8) | |||
| R 2 | 0.11 | 0.24 | 0.24 | 0.41 |
| Adjusted R2 | 0.09 | 0.19 | 0.17 | 0.30 |
*
p < 0.05, **p < 0.01, ***p < 0.001, †p < 0.10.