Table 3.
Univariate and multiple logistic regression models of demographic and work-related characteristics predicting high/very high psychological distress and physical health (N = 216)
| FIFO work characteristics | High/very high psychological distress | Poor physical health | ||
|---|---|---|---|---|
| Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
| Age in years | ||||
| < 35 | 1 | 1 | 1 | 1 |
| 35–44 | 0.53(0.27–2.30) | 0.53(0.20–1.40) | 1.02(0.30–3.51) | 2.44(0.38–15.53) |
| > 44 | 0.49(0.25–0.99)* | 0.37(0.13–1.06) | 2.22(0.76–6.47) | 4.99(0.76–32.71) |
| Sex | ||||
| Male | 1 | 1 | 1 | 1 |
| Female | 1.17(0.64–2.11) | 0.83(0.35–1.94) | 1.54(0.62–3.83) | 2.53(0.60–10.59) |
| Ethnicity | ||||
| Caucasian/White | 1 | 1 | 1 | 1 |
| Other | 0.60(0.25–1.40) | 0.66(0.22–1.99) | 0.56(0.12–2.51) | 0.18(0.02–1.61) |
| Relationship status | ||||
| Married | 1 | 1 | 1 | 1 |
| Single/never married | 1.76(0.83–3.74) | 1.15(0.36–3.70) | 0.40(0.08–1.93) | 0.24(0.03–1.85) |
| Separated/Divorced/Widowed | 0.61(0.21–1.79) | 0.41(0.11–1.52) | 1.13(0.29–4.47) | 0.58(0.09–3.60) |
| De-facto/co-habiting /Civil partnership/Other | 1.63(0.81–3.29) | 1.04(0.38–2.84) | 1.02(0.35–2.97) | 0.81(0.19–3.54) |
| Have children | ||||
| Yes | 1 | 1 | 1 | 1 |
| No | 2.09(1.18–3.72)* | 1.84(0.70–4.81) | 0.83(0.33–2.09) | 1.84(0.43–7.82) |
| Educational status | ||||
| Primary/Secondary education or equivalent | 1 | 1 | 1 | 1 |
| Trade/Apprentice | 1.09(0.50–2.37) | 1.06(0.40–2.81) | 0.93(0.21–4.09) | 0.98(0.16–6.11) |
| TAFE/College | 0.90(0.44–1.86) | 0.70(0.27–1.83) | 2.60(0.84–8.09) | 3.35(0.82–13.72) |
| Bachelor/postgraduate degree | 0.58(0.24–1.38) | 0.55(0.16–1.86) | 1.03(0.23–4.54) | 1.29(0.15–10.96) |
| Alcohol intake | ||||
| No | 1 | 1 | 1 | 1 |
| Yes | 1.00(0.44–2.27) | 0.57(0.19–1.68) | 0.96(0.27–3.50) | 1.09(0.21–5.59) |
| Smoking status | ||||
| No smoker | 1 | 1 | 1 | 1 |
| Ex-smoker | 0.89(0.42–1.86) | 1.34(0.54–3.31) | 2.28 (0.69–7.52) | 2.05(0.42–9.98) |
| Current smoker | 3.64(1.82–7.28)*** | 7.17(2.67–19.26)*** | 3.41(1.08–10.75)* | 5.65(1.13–28.32)* |
| Physical activity | ||||
| Adequate | 1 | 1 | 1 | 1 |
| Inadequate | 1.79(0.96–3.33) | 1.92(0.86–4.32) | 0.42(0.12–1.50) | 0.19(0.04–0.99)* |
| Body Mass Index | ||||
| Normal weight | 1 | 1 | 1 | 1 |
| Underweight | 1.42(0.29–7.02) | 0.92(0.11–7.98) | 2.89 (0.26–32.35) | 5.33(0.28–10.78) |
| Overweight | 0.86(0.41–1.79) | 1.24(0.50–3.05) | 2.29(0.59–8.90) | 3.07(0.50–18.97) |
| Obese | 0.97(0.47–2.00) | 1.45(0.58–3.63) | 2.01(0.51–7.95) | 2.51(0.42–15.05) |
| FIFO role | ||||
| Management/Administration/services | 1 | 1 | 1 | 1 |
| Professional | 1.33(0.47–3.74) | 1.37(0.38–5.00) | 0.38(0.04–3.40) | 1.50(0.09–24.70) |
| Maintenance/Technician | 1.58(0.63–3.93) | 1.63(0.53–5.04) | 1.12(0.28–4.47) | 3.47(0.55–22.04) |
| Production/Drilling/Construction/Labourer | 2.10(0.89–4.98) | 1.53(0.54–4.38) | 1.82(0.53–6.14) | 2.05(0.44–9.61) |
| Machinery operator and driver | 2.37(0.95–5.91) | 0.73(0.22–2.45) | 0.59(0.11–3.25) | 0.66(0.06–6.84) |
| Catering/Other | 1.43(0.42–4.89) | 1.57(0.35–7.05) | 1.40(0.24–8.01) | 0.82(0.09–7.47) |
| Shift pattern | ||||
| Rotation shift/others | 1 | 1 | 1 | 1 |
| Regular shift | 0.61(0.34–1.10) | 0.76(0.34–1.67) | 1.25(0.51–3.09) | 1.59(0.46–5.55) |
| Shift hours | ||||
| < 12 h | 1 | 1 | 1 | 1 |
| ≥ 12 h | 2.82(1.03–7.70)* | 6.63(1.84–23.91)** | 0.35(0.12–0.99)* | 0.18(0.04–0.75)* |
| Consecutive days spent at work | ||||
| 8–14 days | 1 | 1 | 1 | 1 |
| < 8 days | 0.94(0.46–1.93) | 0.72(0.29–1.78) | 1.04(0.32–3.34) | 1.21(0.27–5.39) |
| 15 + days | 0.81(0.27–2.42) | 1.60(0.36–7.11) | 2.17(0.55–8.49) | 3.29(0.53–20.57) |
| Consecutive days spent at home | ||||
| < 8 days | 1 | 1 | 1 | 1 |
| 8–14 days | 0.48(0.19–1.23) | 0.48(0.16–1.49) | 0.65(0.14–2.97) | 0.54(0.08–3.60) |
| FIFO duration | ||||
| ≥ 5 yrs | 1 | 1 | 1 | 1 |
| < 5 yrs | 1.19(0.67–2.11) | 0.89(0.41–1.94) | 0.90(0.36–2.28) | 1.33(0.32–5.52) |
*p < 0.05; **p < 0.01; ***p < 0.001
Reference category: used largest category for age, sex, ethnicity, marital status, education, have children, job, shift pattern, days spent at work and at home, and FIFO duration; and normative category for alcohol, smoking, physical activity, BMI and shift hours)