Table 2 Demographic and baseline characteristics

Age (years)

Mean (SD)

Mean (SD)

Sex (female)

n/N (%)

n/N (%)

- Employed (full time, part time/casual, self-employed)

n/N (%)

n/N (%)

- Cannot work due to health reasons

n/N (%)

n/N (%)

- Home duties

n/N (%)

n/N (%)

- Student

n/N (%)

n/N (%)

- Retired

n/N (%)

n/N (%)

- Other

n/N (%)

n/N (%)

- Negative or nil

n/N (%)

n/N (%)

- Up to $33,799 per year

n/N (%)

n/N (%)

- Between $33,800 and $88,399 per year

n/N (%)

n/N (%)

- Between $88,400 and $207,999 per year

n/N (%)

n/N (%)

- ≥$ 208,000 per year

n/N (%)

n/N (%)

- Do not know

n/N (%)

n/N (%)

Private health insurance (y)

n/N (%)

n/N (%)

Back pain duration (years)

Mean (SD)

Mean (SD)

Episodes of back pain which have recovered (number)

Mean (SD)

Mean (SD)

Back pain compensable (y)

n/N (%)

n/N (%)

Back pain with leg involvement (y)

n/N (%)

n/N (%)

Have another co-existing medical condition needing medication (y)

n/N (%)

n/N (%)

Disability RMDQ score (0-24)

Mean (SD)

Mean (SD)

Pain scale score (0–10)

Mean (SD)

Mean (SD)

Self-reported weight (kg)

Mean (SD)

Mean (SD)

Objective measured weight (kg)

Mean (SD)

Mean (SD)

BMI (kg/m²)

Mean (SD)

Mean (SD)

- Physical component score

Mean (SD)

Mean (SD)

- Mental component score

Mean (SD)

Mean (SD)

Smoker (y)

n/N (%)

n/N (%)

> 10 cigarettes per day (smokers only)

n/N (%)

n/N (%)

Physical activity (minutes MVPA/week)

Mean (SD)

Mean (SD)

Nutrition diet quality score (5–15)

Mean (SD)

Mean (SD)

Poor sleep quality

n/N (%)

n/N (%)

Pain self-efficacy (0–12)

Mean, (SD)

Mean, (SD)

Psychological distress (0–24)

Mean, (SD)

Mean, (SD)

Alcohol consumption

Mean, (SD)

Mean, (SD)

Medication use for back pain (y)

n/N (%)

n/N (%)

Additional care for back pain (y)

n/N (%)

n/N (%)

Community or carer support for back pain (y)

n/N (%)

n/N (%)

Number of days off work due to back pain in last 6 weeks

Median (IQR)

Median (IQR)