Table 2 Logistic regression parameter estimates used to predict sedentary time for individual nonwear epochs
Imputed dataset I | Imputed dataset II | |||
|---|---|---|---|---|
Parameter estimate (SE) | p-value | Parameter estimate (SE) | p-value | |
Intercept | 0.4107 (0.0169) | <.0001 | 0.3787 (0.0178) | <.0001 |
Age, y | 0.0580 (0.0013) | <.0001 | 0.0568 (0.0013) | <.0001 |
Sex | ||||
Male | 0 (referent) | – | 0 (referent) | – |
Female | −0.0540 (0.0075) | <.0001 | −0.0442 (0.0074) | <.0001 |
Race | ||||
White | 0 (referent) | – | 0 (referent) | – |
Other | 0.0146 (0.0013) | <.0001 | 0.0146 (0.0013) | <.0001 |
Family structure | ||||
Dual parent | 0 (referent) | – | 0 (referent) | – |
Single parent | −0.1253 (0.0035) | <.0001 | −0.1258 (0.0034) | <.0001 |
No response | 0.1843 (0.0062) | <.0001 | 0.2024 (0.0062) | <.0001 |
Family income | ||||
≤ $50,000 | 0 (referent) | – | 0 (referent) | – |
$50,001 – $100,000 | 0.0390 (0.0013) | <.0001 | 0.0424 (0.0013) | <.0001 |
≥ $100,000 | −0.0531 (0.0013) | <.0001 | −0.0427 (0.0013) | <.0001 |
No response | −0.0616 (0.0019) | <.0001 | −0.0644 (0.0017) | <.0001 |
Parental education | ||||
High school or less | 0 (referent) | – | 0 (referent) | – |
2-y college | 0.0077 (0.0013) | <.0001 | 0.0055 (0.0014) | <.0001 |
4-y college/university or higher | −0.0352 (0.0012) | <.0001 | −0.0292 (0.0013) | <.0001 |
Chronic medical condition | ||||
Yes | 0 (referent) | – | 0 (referent) | – |
No | −0.0027 (0.0019) | .1568 | −0.0069 (0.0020) | .0006 |
Fast food consumption | ||||
Rarely or never | 0 (referent) | – | 0 (referent) | – |
1 time/month | −0.0303 (0.0012) | <.0001 | −0.0302 (0.0012) | <.0001 |
≥ 2 times/month | 0.0280 (0.0010) | <.0001 | 0.0219 (0.0010) | <.0001 |
Snacking frequency, times per week | −0.0035 (0.0002) | <.0001 | −0.0071 (0.0002) | <.0001 |
Maturity (per unit of maturity offset) | 0.0180 (0.0014) | <.0001 | 0.0151 (0.0014) | <.0001 |
Cardiometabolic risk Z-score | 0.0643 (0.0011) | <.0001 | 0.0607 (0.0012) | <.0001 |
Internalizing symptoms Z-score | 0.0355 (0.0008) | <.0001 | 0.0297 (0.0007) | <.0001 |
Season | ||||
Spring | 0 (referent) | – | 0 (referent) | – |
Summer | 0.0138 (0.0018) | <.0001 | 0.0122 (0.0020) | <.0001 |
Fall | 0.0196 (0.0012) | <.0001 | 0.0226 (0.0014) | <.0001 |
Winter | 0.0552 (0.0012) | <.0001 | 0.0612 (0.0012) | <.0001 |
Type of day | ||||
School day | 0 (referent) | – | 0 (referent) | – |
Weekend or holiday | 0.2005 (0.0022) | <.0001 | 0.1968 (0.0025) | <.0001 |
Camp day | −0.1504 (0.0042) | <.0001 | −0.1433 (0.0051) | <.0001 |
Time of day | ||||
00:00–09:29 | 0 (referent) | – | 0 (referent) | – |
09:30–14:59 | −0.1329 (0.0032) | <.0001 | −0.1339 (0.0033) | <.0001 |
15:00–17:59 | −0.1668 (0.0037) | <.0001 | −0.1664 (0.0038) | <.0001 |
18:00–23:59 | 0.1883 (0.0040) | <.0001 | 0.1900 (0.0040) | <.0001 |
Type of day x time of day interaction | ||||
School day, all hours | 0 (referent) | – | 0 (referent) | – |
Weekend, 00:00–09:29 | 0 (referent) | – | 0 (referent) | – |
Weekend, 09:30–14:59 | −0.0644 (0.0033) | <.0001 | −0.0617 (0.0035) | <.0001 |
Weekend, 15:00–17:59 | −0.0393 (0.0039) | <.0001 | −0.0394 (0.0039) | <.0001 |
Weekend, 18:00–23:59 | −0.1034 (0.0039) | <.0001 | −0.1058 (0.0042) | <.0001 |
Camp day, 00:00–09:29 | 0 (referent) | – | 0 (referent) | – |
Camp day, 09:30–14:59 | −0.0555 (0.0062) | <.0001 | −0.0593 (0.0066) | <.0001 |
Camp day, 15:00–17:59 | 0.0082 (0.0073) | .2589 | 0.0084 (0.0073) | .2505 |
Camp day, 18:00–23:59 | 0.0766 (0.0077) | <.0001 | 0.0816 (0.0079) | <.0001 |
Age x sex interaction | ||||
Older males | 0 (referent) | – | 0 (referent) | – |
Older females | 0.0083 (0.0007) | <.0001 | 0.0081 (0.0006) | <.0001 |
Screen time (average hours/day) | N/A | – | 0.0105 (0.0002) | <.0001 |
# of media devices in the home | N/A | – | 0.0018 (0.0003) | <.0001 |
Homework time | ||||
No homework | N/A | – | 0 (referent) | – |
< 1 h/day | N/A | – | −0.0229 (0.0010) | <.0001 |
≥1 h/day | N/A | – | 0.0011 (0.0012) | .3596 |
Presence of household media rules | ||||
No | N/A | – | 0 (referent) | – |
Yes | N/A | – | 0.0073 (0.0009) | <.0001 |