Table 4.
The correlation of infant sleep duration and sleep problems with infant weight across five time points based on panel data (According to longitudinal community-based retrospective birth cohort study conducted in Changsha in 2013–2014).
| Variable | Weight for Different Time Points (Months Old) | r/ | p-Value |
|---|---|---|---|
| Sleep duration 1 | 1 | −0.100 | 0.027 |
| 3 | −0.229 | 0.000 | |
| 6 | −0.297 | 0.000 | |
| 8 | −0.064 | 0.148 | |
| 12 | −0.010 | 0.823 | |
| Sleep problems 2 | 1 | −0.020 | 0.644 |
| 3 | −0.081 | 0.065 | |
| 6 | −0.017 | 0.703 | |
| 8 | −0.062 | 0.162 | |
| 12 | −0.024 | 0.594 |
1 The correlation of sleep duration and infant weight across five time points were examined by using simple correlation; 2 The correlation of sleep problems and infant weight across five time points were tested by using Spearman rank correlation.