Figure 1.

Figure 2.

Figure 3.

Demographics of the sample_
| Variable | n |
|---|---|
| Gender | |
| Female | 105 |
| Male | 3 |
| Age (years) | |
| 16-24 | 14 |
| 25-34 | 67 |
| 35-44 | 27 |
| Highest Level of Education | |
| Year 10 | 10 |
| Year 12 | 13 |
| Diploma | 19 |
| Associate Degree | 1 |
| Bachelor’s Degree | 45 |
| Master’s Degree | 15 |
| Doctorate Degree | 5 |
| Relationship Status | |
| Single (Never Married) | 7 |
| Married | 81 |
| Separated | 3 |
| Divorced | 1 |
| De Facto | 16 |
| Number of Children | |
| 1 | 55 |
| 2 | 38 |
| 3 | 11 |
| 4 | 4 |
| Language Spoken at Home | |
| English | 105 |
| Other | 3 |
Means, SDs, and t-statistics of demographics and variables of interest by group membership (parents reporting infants who were sleep-disturbed compared to those reporting less sleep disturbance)_
| Variable | Sleep-Disturbed | Not Sleep-Disturbed | t106 | Total |
|---|---|---|---|---|
| n | 48 | 60 | 108 | |
| Gender | ||||
| Female | 47 | 58 | 105 | |
| Male | 1 | 2 | 3 | |
| Age (years) | ||||
| 16-24 | 8 | 6 | 14 | |
| 25-34 | 25 | 42 | 67 | |
| 35-44 | 15 | 12 | 27 | |
| Postnatal Depression | 10.67 ± 5.22 | 8.22 ± 4.45 | -2.63* | 9.31 ± 4.94 |
| Social Support | 79.77 ± 10.04 | 85.72 ± 9.91 | 3.08* | 83.07 ± 10.35 |
| Nocturnal Sleep Time | 9.47 ± 1.14 | 10.95 ± .763 | 7.72** | 10.29 ± 1.20 |
| Daytime Sleep | 2.26 ± 1.04 | 2.55 ± .76 | 1.64 | 2.42 ± .90 |
| Nocturnal Wakefulness | 1.44 ± 1.23 | 0.57 ± 1.16 | 6.78** | 0.96 ± 1.26 |
| No. of Night Wakings | 2.87 ± 1.63 | 1.25 ± 1.08 | -5.65** | 1.97 ± 1.57 |
Correlation Coefficients for postnatal depression (PND), social support, and child sleep variables_
| PND | Social Support | Nocturnal Sleep Duration | Daytime Sleep | Nocturnal Wakefulness | No. of Night Awakenings | |
|---|---|---|---|---|---|---|
| PND | 1 | -0.539** | -0.231* | -0.013 | -0.228* | 0.066 |
| Social Support | 1 | 0.329** | 0.064 | 0.199* | -0.052 | |
| Nocturnal Sleep Duration | 1 | 0.035 | 0.411** | -0.394** | ||
| Daytime Sleep | 1 | -0.096 | 0.115 | |||
| Nocturnal Wakefulness | 1 | -0.469** | ||||
| No. of Night Awakenings | 1 |