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Table 1 Sociodemographic and osteoarthritis characteristics by presenteeism among respondents with osteoarthritis in Japan, 2014

From: Work impairment, osteoarthritis, and health-related quality of life among employees in Japan

   Presenteeism  
Total (N = 233) Presenteeism (N = 166) No Presenteeism(N = 67) p-value*
Female (%, N) 43.8% 102 46.4% 77 37.3% 25 0.206
Age (Mean, SD) 54.2 12.2 52.9 12.4 57.3 11.2 0.012
Married or living with partner (%, N) 66.5% 155 62.7% 104 76.1% 51 0.049
Annual household income (%, N)        0.987
 < ¥3million 14.2% 33 13.9% 23 14.9% 10  
 ¥3million to <¥5million 20.6% 48 20.5% 34 20.9% 14  
 ¥5million to <¥9million 36.5% 85 37.3% 62 34.3% 23  
 ¥9million or more 21.0% 49 21.1% 35 20.9% 14  
 Decline to answer 7.7% 18 7.2% 12 9.0% 6  
Education (%, N)        0.017
 Junior/High School 30.5% 71 26.5% 44 40.3% 27  
 2-year college 14.6% 34 16.3% 27 10.4% 7  
 4-year college 49.4% 115 53.6% 89 38.8% 26  
 Graduate school 5.6% 13 3.6% 6 10.4% 7  
CCI (Mean, SD) 1.1 4.8 1.0 4.4 1.5 5.6 0.462
BMI categories (%, N)        0.665
 Underweight (< 18.5) 7.7% 18 7.2% 12 9.0% 6  
 Normal (18.5–24.9) 61.4% 143 59.0% 98 67.2% 45  
 Overweight (25.0–29.9) 22.7% 53 24.7% 41 17.9% 12  
 Obese (30.0+) 6.9% 16 7.2% 12 6.0% 4  
 Decline to answer 1.3% 3 1.8% 3 0.0% 0  
Smoking status (%, N)        0.518
 Current smoker 26.2% 61 24.1% 40 31.3% 21  
 Former smoker 34.3% 80 35.5% 59 31.3% 21  
 Never smoker 39.5% 92 40.4% 67 37.3% 25  
Drinks alcohol (%, N) 75.5% 176 74.1% 123 79.1% 53 0.421
Exercise (%, N) 51.1% 119 51.8% 86 49.3% 33 0.724
Length of arthritis diagnosis, yearsa (Mean, SD) 8.4 11.3 8.4 11.0 8.2 12.0 0.897
Number of joints affected (Mean, SD) 2.0 1.9 1.9 1.7 2.1 2.2 0.482
Site affected by arthritis (%, N)
 Ankles 15.9% 37 17.5% 29 11.9% 8 0.330
 Elbows 13.3% 31 12.0% 20 16.4% 11 0.397
 Feet 14.6% 34 14.5% 24 14.9% 10 1.000
 Fingers/Hands 26.6% 62 25.3% 42 29.9% 20 0.477
 Hips 14.2% 33 15.1% 25 11.9% 8 0.679
 Knees 51.9% 121 50.6% 84 55.2% 37 0.564
 Neck 10.3% 24 10.2% 17 10.4% 7 1.000
 Shoulders 14.2% 33 12.0% 20 19.4% 13 0.151
 Spine 3.0% 7 3.0% 5 3.0% 2 1.000
 Wrists 16.7% 39 17.5% 29 14.9% 10 0.702
 Other 6.0% 14 4.2% 7 10.4% 7 0.123
Severity of arthritis (%, N)
 Mild 51.5% 120 51.2% 85 52.2% 35 0.959
 Moderate 38.6% 90 39.2% 65 37.3% 25  
 Severe 9.9% 23 9.6% 16 10.4% 7  
Frequency of problems with arthritis (%, N)        0.520
 Daily 33.0% 77 35.5% 59 26.9% 18  
 4–6 times a week 7.7% 18 8.4% 14 6.0% 4  
 2–3 times a week 12.9% 30 13.3% 22 11.9% 8  
 Once a week 2.6% 6 3.0% 5 1.5% 1  
 2–3 times a month 14.2% 33 12.0% 20 19.4% 13  
 Once a month or less often 29.6% 69 27.7% 46 34.3% 23  
Use a prescription for OA (%, N) 32.6% 76 37.3% 62 20.9% 14 0.015
  1. Note: BMI body mass index, CCI Charlson Comorbidity Index, OA osteoarthritis
  2. *Differences between none vs. any presenteeism were performed using t-tests for continuous variables and chi-square or Fisher exact (cells < 5) tests for categorical variables
  3. aData for length of diagnosis were missing for an additional 12 respondents overall