Skip to main content

Table 3 Occupational factors associated with lower limbs varicose veins (LLVV)

From: Epidemiological, life style, and occupational factors associated with lower limb varicose veins: a case control study

Occupational factors Cases Controls OR (95% CI) P value
No. % No. %
Employment status (n = 150) (n = 150)   
 Never employed 32 21.3 34 22.7 1.08 (0.62, 1.86) 0.78
 Ever employed (currently/previously) 118 78.7 116 77.3
Among ever employed (n = 118) (n = 116)   
 Duration of employment (years)       
  Min-max 2-50 2-50   
  Mean± SD 23.55 ± 13.70 24.50 ± 14.09 0.99 (0.98, 1.01) 0.60
 ISCO classification#       
  Professionals^ 3 2.5 22 19.0 1  
 Technicians and associated professionals 24 20.3 43 37.1 0.27 (0.01, 4.00) 0.34
  Service and sales workers 10 8.5 21 18.1 1.11 (0.09, 12.96) 0.93
  Skilled agricultural and fishery workers 3 2.5 2 1.7 0.95 (0.07, 11.78) 0.97
  Craft and related trade workers 32 27.1 8 6.9 3.00 (0.15, 59.89) 0.47
  Plant and machine operators 45 38.1 18 15.5 8.00 (0.64, 99.66) 0.10
  Elementary occupations 1 0.8 2 1.7 5.00 (0.42, 58.63) 0.20
 Working hours/day#       
  Working > 8 h/day 47 39.8 22 19.0 2.82 (1.56, 5.11) >0.001***
  Working ≤ 8 h/day^ 71 60.2 94 81.0
 Working hours/week#       
  Working > 48 h/week 47 39.8 24 20.7 2.53 (1.41, 4.53) >0.01**
  Working ≤ 48 h/week^ 71 60.2 92 79.3
 Work time#       
  Day work^ 75 63.6 115 99.1 65.93 (8.8, 489.1) 0.001**
  Shift work 43 36.4 1 0.9
 Nature of work#       
  Blue/pink collar 91 77.1 53 45.7 4.00 (2.28, 7.04) >0.001***
  White collar^ 27 22.9 63 54.3
 Posture at work#       
  Standing 66 55.9 18 15.5 6.91 (3.71, 12.84) >0.001***
  Sitting^ 52 44.1 98 84.5
 Sitting hours/working day#       
  Sitting ≤ 4 h/ working day 65 55.1 21 18.1 5.54 (3.05, 10.06) >0.001***
  Sitting < 4 h/ working day^ 53 44.9 95 81.9
 Standing hours/working day#       
  Standing <4 h/working day 64 54.2 18 15.5 6.45 (3.47, 11.98) >0.001***
  Standing >4 h/working day^ 54 45.8 98 84.5
 Lifting heavy objects (hours/working day)#       
  ≥ 2 h/working day 7 5.9 1 0.9 7.25 (0.87, 59.90) 0.06
  < 2 h/working day^ 111 94.1 115 99.1
  1. ISCO International Standard Classification of Occupations, SD standard deviation, CI confidence interval, OR odds ratio
  2. ^Reference category
  3. #Number of participants currently/previously employed (cases = 118, controls = 116)
  4. **p> 0.01
  5. ***p>0.001