Table 1 Psychometric properties of the outcome measures in this study

Edinburgh Postnatal Depression Scale (EPDS)

Not reported

Scale had 100% sensitivity (percentage of true cases identified) and 89% specificity (percentage of true non cases identified as such) when tested against the DSMIIIR diagnostic criteria for major depression (for Australian sample of 103 postpartum women) [30].

General Sleep Disturbance Scale (GSDS)

Internal consistency reliability coefficient of .85[31, 32].

Validated with sleep logs (r = .41) and Actigraph results (r = −.42)[31]

Assessment of Quality of Life 8D (AQoL8D)

Test retest reliability of .91 (baseline and 2 weeks) and .89 (baseline and one month) [33]

When compared with 6 other Quality of Life Instruments* the AQoL8D had an average intra class correlation coefficient of .57[34].

Actigraph Accelerometer

Overall intra- and inter- instrument reliability for activity counts: mean CV intra = 2.9% and mean CV inter = 3.5%[35]

Validated with doubly labeled water (r = 0.58, p < 0.001)[36]