Table 3

Hierarchical regression analysis with sleep-related evening shift tolerance total score as the dependent variable (N=583)

PredictorBSE BβtR2/ΔR2
Step 10.030/0.030 **
 Age−0.080.022−0.16−3.57***
 Gender (male=1, female=2)−0.590.581−0.04−1.01
 Marital status (partner=1, no partner=2)0.830.3980.092.10*
 Children (yes=1, no=2)−0.540.375−0.07−1.45
Step 20.031/0.001
 Age−0.070.024−0.15−3.07**
 Gender (male=1, female=2)−0.570.595−0.04−0.95
 Marital status (partner=1, no partner=2)0.800.4010.092.00*
 Children (yes=1, no=2)−0.570.388−0.07−1.48
 Alcohol0.040.0640.020.55
 Caffeine (cups of caffeine beverages in a day)−0.030.075−0.02−0.36
 Smoking (yes=1, no=2)−0.270.632−0.02−0.43
Step 30.032/.001
 Age−0.070.026−0.14−2.66**
 Gender (male=1, female=2)−0.530.601−0.04−0.89
 Marital status (partner=1, no partner=2)0.780.4030.091.94
 Children (yes=1, no=2)−0.640.395−0.08−1.61
 Alcohol0.030.0640.020.50
 Caffeine (cups of caffeine beverages in a day)−0.030.076−0.02−0.35
 Smoking (yes=1, no=2)−0.260.634−0.02−0.41
 Percentage position0.130.1790.030.70
 Number of years worked as a nurse−0.030.047−0.03−0.68
 Night shifts worked during the last year0.000.0070.010.23
Step 40.122/.090 ***
 Age−0.090.026−0.18−3.54***
 Gender (male=1, female=2)−0.610.581−0.04−1.05
 Marital status (partner=1, no partner=2)0.620.3880.071.60
 Children (yes=1, no=2)−0.660.382−0.08−1.72
 Alcohol0.020.0620.020.36
 Caffeine (cups of caffeine beverages in a day)−0.050.073−0.03−0.68
 Smoking (yes=1, no=2)−0.250.616−0.02−0.40
 Percentage position0.160.1710.040.96
 Number of years worked as a nurse−0.000.045−0.00−0.05
 Night shifts worked during the last year−0.010.007−0.04−0.89
 Morningness−0.010.059−0.01−0.13
 Languidity−0.140.055−0.13−2.63**
 Flexibility0.200.0460.204.41***
 Hardiness0.110.0380.122.95**
  • *p<0.05, **p<0.01, ***p<0.001.

  • β, Standardised coefficients; B, non-standardised coefficients; SE B, the SE of β.