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Table 1 Sample characteristics

From: An exploration of the dynamic longitudinal relationship between mental health and alcohol consumption: a prospective cohort study

  n % or mean ± SD
MCS   
 Phase 5 6,330 51.1 ± 9.4
 Phase 7 5,436 52.4 ± 8.8
 Phase 9 5,195 53.8 ± 8.0
UK units of alcohol   
 Phase 5 6,330 14.6 ± 15.2
 Phase 7 5,508 13.0 ± 13.0
 Phase 9 5,215 11.1 ± 11.3
Age, years 6,330 55.8 ± 6.0
Sex   
 Male 4,594 72.6
 Female 1,736 27.4
 Total 6,330  
Ethnicity   
 White 5,966 94.25
 Non-white 364 5.75
 Total 6,330  
SES   
 High 2,852 45.3
 Intermediate 2,731 43.4
 Low 713 11.3
 Total 6,296  
Marital status   
 Married/cohabiting 4,861 79.6
 Other 1,248 20.4
 Total 6,109  
Education   
 University 2,176 36.4
 Post-secondary 1,648 27.5
 Secondary 1,558 26.0
 No qualifications 604 10.1
 Total 5,986  
Economic activity   
 Active 4,123 65.2
 Inactive 2,203 34.8
 Total 6,326  
Current smoker   
 No 5,539 89.4
 Yes 654 10.6
 Total 6,193  
Problem drinking (CAGE case)   
 No 5,531 89.0
 Yes 684 11.0
 Total 6,215  
Physical activity   
 Active 3,405 54.16
 Moderately active 1,057 16.78
 Inactive 1,837 29.16
 Total 6,299  
Network score 6,053 7.3 ± 3.0
CHD   
 No 5,948 94.0
 Yes 382 6.0
 Total 6,330  
Known diabetes   
 No 6,076 96.0
 Yes 254 4.0
 Total 6,330  
Anti-depressant medication   
 No 6,149 97.3
 Yes 171 2.7
 Total 6,320  
Poor self-reported physical health   
 No 4,821 76.2
 Yes 1,509 23.8
 Total 6,330  
Long-standing illness   
 No 3,248 51.4
 Yes 3,075 48.6
 Total 6,323  
Stroke   
 No 6,301 99.5
 Yes 29 0.5
 Total 6,330  
TIA   
 No 6,287 99.3
 Yes 43 0.7
 Total 6,330  
Resting heart rate > 80 bpm   
 No 4,969 88.15
 Yes 668 11.85
 Total 5,637  
BMI 4,916 26.1 ± 3.9
Serum cholesterol, mmol/l 5,622 5.9 ± 1.1
Blood pressure, mmHg   
 Systolic 5,669 123.1 ± 16.4
 Diastolic 5,669 77.6 ± 10.6
  1. BMI, body mass index; bpm, beats per minute; CHD, coronary heart disease; MCS, mental health component score; SES, socioeconomic status; TIA, transient ischemic attack.