Descriptives

Descriptives
 HADS-A Total - PrevalenceHADS-D PrevalencePCL PrevalenceSCOFF PrevalenceMOCI PrevalenceAUDIT PrevalenceFTND PrevalenceDES PrevalenceOLBI Prevalence
N22922922922922913745229229
Missing000009218400
Mean         
Median         
Minimum         
Maximum         

 

Frequencies

Frequencies of HADS-A Total - Prevalence
LevelsCounts% of TotalCumulative %
No15366.8 %66.8 %
Yes7633.2 %100.0 %

 

Frequencies of HADS-D Prevalence
LevelsCounts% of TotalCumulative %
No19384.3 %84.3 %
Yes3615.7 %100.0 %

 

Frequencies of PCL Prevalence
LevelsCounts% of TotalCumulative %
No19786.0 %86.0 %
Oui3214.0 %100.0 %

 

Frequencies of SCOFF Prevalence
LevelsCounts% of TotalCumulative %
No21593.9 %93.9 %
Yes146.1 %100.0 %

 

Frequencies of MOCI Prevalence
LevelsCounts% of TotalCumulative %
No21493.4 %93.4 %
Yes156.6 %100.0 %

 

Frequencies of AUDIT Prevalence
LevelsCounts% of TotalCumulative %
No10677.4 %77.4 %
Yes3122.6 %100.0 %

 

Frequencies of FTND Prevalence
LevelsCounts% of TotalCumulative %
None1942.2 %42.2 %
Low1431.1 %73.3 %
Medium817.8 %91.1 %
Strong48.9 %100.0 %

 

Frequencies of DES Prevalence
LevelsCounts% of TotalCumulative %
No21995.6 %95.6 %
Yes104.4 %100.0 %

 

Frequencies of OLBI Prevalence
LevelsCounts% of TotalCumulative %
Low4017.5 %17.5 %
High3515.3 %32.8 %
Medium15467.2 %100.0 %

 

Correlation Matrix

Correlation Matrix
  TRAUMAWORKTOTALTRAUMAWORKINTENSITYHADS-A TotalHADS-D TotalPCL TotalSCOFF TotalAUDIT TotalMOCI TotalFTND TotalDES TotalOLBI Total
TRAUMAWORKTOTALSpearman's rho          
 p-value          
TRAUMAWORKINTENSITYSpearman's rho0.655***         
 p-value< .001         
HADS-A TotalSpearman's rho0.0280.118        
 p-value0.6740.075        
HADS-D TotalSpearman's rho0.0500.205**0.381***       
 p-value0.4550.002< .001       
PCL TotalSpearman's rho0.0830.177**0.561***0.524***      
 p-value0.2090.007< .001< .001      
SCOFF TotalSpearman's rho0.0600.135*0.233***0.236***0.225***     
 p-value0.3640.041< .001< .001< .001     
AUDIT TotalSpearman's rho0.0780.0980.1480.0900.208*0.243**    
 p-value0.3660.2540.0830.2970.0150.004    
MOCI TotalSpearman's rho-0.0340.0620.457***0.311***0.474***0.248***0.082   
 p-value0.6140.348< .001< .001< .001< .0010.338   
FTND TotalSpearman's rho0.0400.1710.2630.1030.1580.063-0.2450.194  
 p-value0.7940.2610.0800.5010.3000.6810.1830.202  
DES TotalSpearman's rho-0.0290.0940.400***0.269***0.496***0.280***0.0920.499***0.145 
 p-value0.6630.155< .001< .001< .001< .0010.285< .0010.344 
OLBI TotalSpearman's rho0.1220.242***0.406***0.524***0.408***0.1110.201*0.272***0.2000.191**
 p-value0.066< .001< .001< .001< .0010.0930.018< .0010.1870.004
Note. * p < .05, ** p < .01, *** p < .001

 

Descriptives

Descriptives
 TYPEOLBI TotalDES TotalFTND TotalAUDIT TotalMOCI TotalSCOFF TotalPCL TotalHADS-D TotalHADS-A Total
NSAMU993799999
 Police959516569595959595
 Firefighter585811345858585858
 Other992899999
 First Aider585813325858585858
MissingSAMU006200000
 Police00793900000
 Firefighter00472400000
 Other007100000
 First Aider00452600000
MeanSAMU31.45.792.003.431.330.6674.561.895.56
 Police39.37.943.695.481.760.84215.64.446.76
 Firefighter36.28.212.555.591.900.94812.24.726.50
 Other35.714.33.003.002.440.66720.74.677.44
 First Aider34.914.32.855.092.210.89712.94.296.57
MedianSAMU31.05.712.003.001.001.004.002.005.00
 Police39.05.714.004.001.001.0011.04.007.00
 Firefighter35.06.432.005.001.001.0011.04.006.00
 Other34.07.503.003.002.000.0017.04.006.00
 First Aider34.08.573.005.001.001.0010.04.006.00
MinimumSAMU27.03.930.002.000.000.000.000.003.00
 Police21.00.000.001.000.000.000.000.002.00
 Firefighter24.00.000.001.000.000.000.000.002.00
 Other29.02.503.001.000.000.000.000.005.00
 First Aider16.00.000.001.000.000.000.000.000.00
MaximumSAMU39.08.214.005.003.002.0011.04.008.00
 Police64.040.47.0018.09.004.0061.015.013.0
 Firefighter54.021.47.0017.08.004.0043.014.011.0
 Other42.041.43.005.005.002.0038.08.0012.0
 First Aider60.01007.0017.011.04.0039.015.013.0

 

One-Way ANOVA

One-Way ANOVA (Welch's)
 Fdf1df2p
TRAUMAWORKTOTAL6.316430.8< .001
TRAUMAWORKINTENSITY12.770433.2< .001
TRAUMAINTENSITYPERWORK1.344431.50.275
HADS-A Total1.269432.60.302
HADS-D Total6.506436.4< .001
PCL Total12.015440.4< .001
SCOFF Total0.375432.60.825
MOCI Total1.018434.30.412
AUDIT Total5.307434.50.002
FTND TotalNaN4NaNNaN
DES Total5.625444.0< .001
OLBI Total6.586436.4< .001

 

Post Hoc Tests

Games-Howell Post-Hoc Test – TRAUMAWORKTOTAL
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-80.5-53989.0135.4
 p-value0.9440.3410.9240.665
PoliceMean difference -459169.5215.9***
 p-value 0.4580.134< .001
FirefighterMean difference  628.5674.9
 p-value  0.1640.106
OtherMean difference   46.4
 p-value   0.893
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – TRAUMAWORKINTENSITY
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference4.76-6.9021.925.72
 p-value0.9810.9450.2390.090
PoliceMean difference -11.6617.120.96***
 p-value 0.1720.094< .001
FirefighterMean difference  28.8**32.62***
 p-value  0.004< .001
OtherMean difference   3.83
 p-value   0.968
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – TRAUMAINTENSITYPERWORK
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference1.511.47251.1220.620
 p-value0.4910.5120.7850.972
PoliceMean difference -0.0352-0.386-0.888
 p-value 1.0000.9250.487
FirefighterMean difference  -0.351-0.853
 p-value  0.9460.531
OtherMean difference   -0.502
 p-value   0.947
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – HADS-A Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-1.20-0.944-1.889-1.0134
 p-value0.2950.5580.3710.514
PoliceMean difference 0.258-0.6870.1889
 p-value 0.9650.9310.991
FirefighterMean difference  -0.944-0.0690
 p-value  0.8311.000
OtherMean difference   0.8755
 p-value   0.870
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – HADS-D Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-2.55**-2.835***-2.7778-2.404**
 p-value0.002< .0010.0640.007
PoliceMean difference -0.282-0.22460.149
 p-value 0.9840.9990.999
FirefighterMean difference  0.05750.431
 p-value  1.0000.956
OtherMean difference   0.374
 p-value   0.994
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – PCL Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-11.1***-7.63***-16.11-8.307***
 p-value< .001< .0010.070< .001
PoliceMean difference 3.43-5.052.759
 p-value 0.4520.8640.694
FirefighterMean difference  -8.48-0.672
 p-value  0.5140.997
OtherMean difference   7.805
 p-value   0.590
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – SCOFF Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-0.175-0.2820.000-0.2299
 p-value0.9540.8431.0000.912
PoliceMean difference -0.1060.175-0.0544
 p-value 0.9720.9750.997
FirefighterMean difference  0.2820.0517
 p-value  0.9020.999
OtherMean difference   -0.2299
 p-value   0.948
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – MOCI Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-0.425-0.563-1.111-0.874
 p-value0.8070.6630.6100.399
PoliceMean difference -0.139-0.687-0.449
 p-value 0.9930.8680.808
FirefighterMean difference  -0.548-0.310
 p-value  0.9400.953
OtherMean difference   0.238
 p-value   0.998
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – AUDIT Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-2.05-2.1600.429-1.665
 p-value0.0680.0580.9650.193
PoliceMean difference -0.1062.482*0.388
 p-value 1.0000.0140.988
FirefighterMean difference  2.588*0.494
 p-value  0.0120.973
OtherMean difference   -2.094
 p-value   0.053
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – FTND Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-1.69-0.545-1.000-0.846
 p-value0.7150.9920.8890.961
PoliceMean difference 1.1420.6880.841
 p-value 0.7340.7970.890
FirefighterMean difference  -0.455-0.301
 p-value  0.9610.998
OtherMean difference   0.154
 p-value   0.999
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – DES Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-2.14-2.421-8.49-8.5167**
 p-value0.1310.0870.3570.005
PoliceMean difference -0.278-6.35-6.3743
 p-value 0.9990.6120.071
FirefighterMean difference  -6.07-6.0961
 p-value  0.6490.096
OtherMean difference   -0.0246
 p-value   1.000
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – OLBI Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-7.82***-4.76*-4.222-3.504
 p-value< .0010.0300.3200.253
PoliceMean difference 3.063.5964.315*
 p-value 0.1120.4140.042
FirefighterMean difference  0.5401.259
 p-value  0.9990.909
OtherMean difference   0.718
 p-value   0.997
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Independent Samples T-Test

Independent Samples T-Test
  statisticdfp
 

 

Independent Samples T-Test

Independent Samples T-Test
  statisticp
HADS-A TotalMann-Whitney U47410.048
HADS-D TotalMann-Whitney U55220.780
PCL TotalMann-Whitney U47360.049
SCOFF TotalMann-Whitney U54180.590
MOCI TotalMann-Whitney U50610.194
AUDIT TotalMann-Whitney U12600.031
FTND TotalMann-Whitney U1190.125
DES TotalMann-Whitney U44940.013
OLBI TotalMann-Whitney U55700.861

 

Group Descriptives
 GroupNMeanMedianSDSE
HADS-A TotalFéminin727.1116.502.3410.276
 Masculin1576.4016.002.390.1910
HADS-D TotalFéminin724.1944.002.9870.352
 Masculin1574.4714.003.370.2686
PCL TotalFéminin7215.97212.5013.1641.551
 Masculin15712.8289.0012.631.0080
SCOFF TotalFéminin720.8061.000.9290.109
 Masculin1570.8981.001.010.0804
MOCI TotalFéminin722.1941.502.3360.275
 Masculin1571.7901.002.030.1622
AUDIT TotalFéminin324.1883.003.2070.567
 Masculin1055.4675.003.680.3588
FTND TotalFéminin104.0004.002.1080.667
 Masculin352.7433.002.340.3961
DES TotalFéminin7210.4418.217.8050.920
 Masculin1579.4865.7112.240.9772
OLBI TotalFéminin7236.77836.008.4570.997
 Masculin15737.02537.008.480.6768

 

Independent Samples T-Test

Independent Samples T-Test
  statisticp
OLBI TotalMann-Whitney U63680.724
MOCI TotalMann-Whitney U54200.021
AUDIT TotalMann-Whitney U22540.698
DES TotalMann-Whitney U64180.801
FTND TotalMann-Whitney U1910.407
SCOFF TotalMann-Whitney U59570.209
PCL TotalMann-Whitney U61740.458
HADS-D TotalMann-Whitney U57950.132
HADS-A TotalMann-Whitney U58240.147

 

Group Descriptives
 GroupNMeanMedianSDSE
OLBI TotalSecondary11936.94136.007.8400.7187
 Tertiary11036.95536.0009.1110.8687
MOCI TotalSecondary1192.1762.002.1690.1989
 Tertiary1101.6361.0002.0710.1975
AUDIT TotalSecondary715.2115.003.6130.4288
 Tertiary665.1214.0003.6180.4454
DES TotalSecondary11910.6516.4313.1801.2082
 Tertiary1108.8516.0718.0570.7682
FTND TotalSecondary303.2333.502.3440.4280
 Tertiary152.6002.0002.3240.6000
SCOFF TotalSecondary1190.9331.000.9810.0899
 Tertiary1100.8000.5000.9840.0938
PCL TotalSecondary11914.70611.0013.7311.2587
 Tertiary11012.85510.00011.8231.1273
HADS-D TotalSecondary1194.7064.003.3810.3099
 Tertiary1104.0364.0003.0740.2931
HADS-A TotalSecondary1196.8497.002.5000.2291
 Tertiary1106.3826.0002.2630.2157

 

One-Way ANOVA

not enough observations
One-Way ANOVA (Welch's)
 Fdf1df2p
HADS-A Total....
HADS-D Total....

 

Correlation Matrix

Correlation Matrix
  HADS-A TotalHADS-D TotalPCL TotalSCOFF TotalMOCI TotalAUDIT TotalDES TotalOLBI TotalAET8
HADS-A TotalSpearman's rho        
 p-value        
HADS-D TotalSpearman's rho0.381***       
 p-value< .001       
PCL TotalSpearman's rho0.561***0.524***      
 p-value< .001< .001      
SCOFF TotalSpearman's rho0.233***0.236***0.225***     
 p-value< .001< .001< .001     
MOCI TotalSpearman's rho0.457***0.311***0.474***0.248***    
 p-value< .001< .001< .001< .001    
AUDIT TotalSpearman's rho0.1480.0900.208*0.243**0.082   
 p-value0.0830.2970.0150.0040.338   
DES TotalSpearman's rho0.400***0.269***0.496***0.280***0.499***0.092  
 p-value< .001< .001< .001< .001< .0010.285  
OLBI TotalSpearman's rho0.406***0.524***0.408***0.1110.272***0.201*0.191** 
 p-value< .001< .001< .0010.093< .0010.0180.004 
AET8Spearman's rho0.2510.2510.454-0.1150.215-0.647-0.3080.330
 p-value0.4560.4570.1610.7370.5250.1650.3570.321
Note. * p < .05, ** p < .01, *** p < .001

 

ANOVA

ANOVA
 Sum of SquaresdfMean SquareFp
 

 

One-Way ANOVA

One-Way ANOVA (Welch's)
 Fdf1df2p
TRAUMAWORKTOTAL6.316430.8< .001
TRAUMAINTENSITYPERWORK1.344431.50.275
HADS-A Total1.269432.60.302
HADS-D Total6.506436.4< .001
PCL Total12.015440.4< .001
SCOFF Total0.375432.60.825
MOCI Total1.018434.30.412
AUDIT Total5.307434.50.002
FTND TotalNaN4NaNNaN
DES Total5.625444.0< .001
OLBI Total6.586436.4< .001

 

Post Hoc Tests

Games-Howell Post-Hoc Test – TRAUMAWORKTOTAL
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-80.5-53989.0135.4
 p-value0.9440.3410.9240.665
PoliceMean difference -459169.5215.9***
 p-value 0.4580.134< .001
FirefighterMean difference  628.5674.9
 p-value  0.1640.106
OtherMean difference   46.4
 p-value   0.893
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – TRAUMAINTENSITYPERWORK
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference1.511.47251.1220.620
 p-value0.4910.5120.7850.972
PoliceMean difference -0.0352-0.386-0.888
 p-value 1.0000.9250.487
FirefighterMean difference  -0.351-0.853
 p-value  0.9460.531
OtherMean difference   -0.502
 p-value   0.947
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – HADS-A Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-1.20-0.944-1.889-1.0134
 p-value0.2950.5580.3710.514
PoliceMean difference 0.258-0.6870.1889
 p-value 0.9650.9310.991
FirefighterMean difference  -0.944-0.0690
 p-value  0.8311.000
OtherMean difference   0.8755
 p-value   0.870
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – HADS-D Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-2.55**-2.835***-2.7778-2.404**
 p-value0.002< .0010.0640.007
PoliceMean difference -0.282-0.22460.149
 p-value 0.9840.9990.999
FirefighterMean difference  0.05750.431
 p-value  1.0000.956
OtherMean difference   0.374
 p-value   0.994
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – PCL Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-11.1***-7.63***-16.11-8.307***
 p-value< .001< .0010.070< .001
PoliceMean difference 3.43-5.052.759
 p-value 0.4520.8640.694
FirefighterMean difference  -8.48-0.672
 p-value  0.5140.997
OtherMean difference   7.805
 p-value   0.590
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – SCOFF Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-0.175-0.2820.000-0.2299
 p-value0.9540.8431.0000.912
PoliceMean difference -0.1060.175-0.0544
 p-value 0.9720.9750.997
FirefighterMean difference  0.2820.0517
 p-value  0.9020.999
OtherMean difference   -0.2299
 p-value   0.948
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – MOCI Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-0.425-0.563-1.111-0.874
 p-value0.8070.6630.6100.399
PoliceMean difference -0.139-0.687-0.449
 p-value 0.9930.8680.808
FirefighterMean difference  -0.548-0.310
 p-value  0.9400.953
OtherMean difference   0.238
 p-value   0.998
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – AUDIT Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-2.05-2.1600.429-1.665
 p-value0.0680.0580.9650.193
PoliceMean difference -0.1062.482*0.388
 p-value 1.0000.0140.988
FirefighterMean difference  2.588*0.494
 p-value  0.0120.973
OtherMean difference   -2.094
 p-value   0.053
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – FTND Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-1.69-0.545-1.000-0.846
 p-value0.7150.9920.8890.961
PoliceMean difference 1.1420.6880.841
 p-value 0.7340.7970.890
FirefighterMean difference  -0.455-0.301
 p-value  0.9610.998
OtherMean difference   0.154
 p-value   0.999
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – DES Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-2.14-2.421-8.49-8.5167**
 p-value0.1310.0870.3570.005
PoliceMean difference -0.278-6.35-6.3743
 p-value 0.9990.6120.071
FirefighterMean difference  -6.07-6.0961
 p-value  0.6490.096
OtherMean difference   -0.0246
 p-value   1.000
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Games-Howell Post-Hoc Test – OLBI Total
  SAMUPoliceFirefighterOtherFirst Aider
SAMUMean difference-7.82***-4.76*-4.222-3.504
 p-value< .0010.0300.3200.253
PoliceMean difference 3.063.5964.315*
 p-value 0.1120.4140.042
FirefighterMean difference  0.5401.259
 p-value  0.9990.909
OtherMean difference   0.718
 p-value   0.997
First AiderMean difference    
 p-value    
Note. * p < .05, ** p < .01, *** p < .001

 

Linear Regression

Model Fit Measures
Overall Model Test
ModelRAdjusted R²Fdf1df2p
10.1610.02580.01432.251850.137

 

Model Coefficients - HADS-A Total
PredictorEstimateSEtp
Intercept6.545990.2516126.02< .001
INON7-0.003120.00208-1.500.137

 

Linear Regression

Model Fit Measures
ModelR
1..

 

Model Coefficients - INON7
PredictorEstimateSEtp
Intercept....

 

Correlation Matrix

Correlation Matrix
  INON7HADS-D Total
INON7Spearman's rho 
 p-value 
HADS-D TotalSpearman's rho0.236
 p-value0.027

 

Linear Regression

Model Fit Measures
ModelRAdjusted R²
10.09950.00990-0.00174

 

Omnibus ANOVA Test
 Sum of SquaresdfMean SquareFp
INON710.2110.20.8500.359
Residuals1023.58512.0  
Note. Type 3 sum of squares
[3]

 

Model Coefficients - HADS-D Total
PredictorEstimateSEtp
Intercept4.563570.3795512.024< .001
INON7-0.002900.00314-0.9220.359

 

References

[1] The jamovi project (2019). jamovi. (Version 1.1) [Computer Software]. Retrieved from https://www.jamovi.org.

[2] R Core Team (2018). R: A Language and envionment for statistical computing. [Computer software]. Retrieved from https://cran.r-project.org/.

[3] Fox, J., & Weisberg, S. (2018). car: Companion to Applied Regression. [R package]. Retrieved from https://cran.r-project.org/package=car.