Table 1

Person-level descriptive statistics, intraclass correlations (ICCs) and estimates of multilevel models testing differences in health behaviour of fly-in, fly-out workers and their partners for on-shift and off-shift days

Descriptive statisticsIntraclass correlationsPartners vs workersOn-shift vs off-shift daysStatus×day interaction
Model 1Model 2
M (SD)*ICC (95% CI)γ, 95% CIγ, 95% CIγ, 95% CI
Sleep quality0.04 (1.04)0.33 (0.24 to 0.43)−0.20 (−0.51 to 0.10) −0.56 (−0.72 to −0.40) 0.56 (0.14 to 0.94)
Nutrition quality0.35 (1.01)0.47 (0.38 to 0.57)−0.17 (−0.50 to 0.15) −0.17 (−0.33 to −0.02) 0.26 (−0.10 to 0.60)
Exercise time (min/day)43.80 (58.81)0.18 (0.09 to 0.29)−10.96 (−0.48 to 0.11) −10.78 (−0.36 to −0.00) 3.65 (−16.27 to 26.88)
Relaxation time (hours/day)2.78 (4.35)0.31 (0.22 to 0.42)−0.65 (−1.87 to 0.69) −1.22 (−1.87 to −0.61) 0.80 (−0.75 to 2.39)
Alcohol drinks (#/day)1.05 (1.69)0.29 (0.20 to 0.39) −0.91 (−1.50 to −0.26) −1.12 (−1.48 to −0.76) 1.16 (0.32 to 2.00)
Cigarettes (#/day)†13.22 (8.46)0.92 (0.89 to 0.94)4.86 (−7.88 to 16.69) 24.20 (0.86 to 45.88) −15.79 (−30.00 to −0.57)
Mental health medication (#/day)‡0.08 (0.27)0.93 (0.91 to 0.95)0.09 (−36.03 to 38.87)1.65 (−1.24 to 4.26)−11.33 (−51.81 to 28.10)
Physical health medication (#/day)‡0.16 (0.34)0.78 (0.72 to 0.83)0.39 (−8.40 to 8.14) 1.44 (0.36 to 2.54) −0.52 (−2.86 to 1.93)
  • *Descriptive statistics calculated for person-level averages across days.

  • †Used  subsample of 68 days from 19 individuals who smoked.

  • ‡Logistic models.

  • Bold text indicates estimates are statistically significantly different from zero.