Table 1

Psychometric properties of the outcome measures in this study
Instrument Reliability Validity
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]

The 6 Quality of life instruments that the AQOL8D was compared with included: EuroQoL, Health Utilities Index Mark 3, Short Form Six Dimensions, Person Wellbeing Index, Satisfaction with Life Scale and Kessler Psychological Distress Scale.

Kernot et al.

Kernot et al. BMC Public Health 2013 13:518   doi:10.1186/1471-2458-13-518

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