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Table 1 Sample differences on demographic measures (N = 120)

From: Physical activity and sleep differences between osteoarthritis, rheumatoid arthritis and non-arthritic people in China: objective versus self report comparisons

  Group   
Osteoarthritis (N = 40) Rheumatoid Arthritis (N = 40) Control (N = 40)   
Measure Mean (SD) or N (%) Mean (SD) or N (%) Mean (SD) or N (%) F / χ2 p
Age 57.90 (17.51) 59.35 (16.52) 54.40 (15.87) 0.94 .396
Body mass index 23.73 (3.90) 24.03 (2.59) 22.54 (2.58) 2.62 .077
Current Relationship (Yes) 33 (83%) 27 (68%) 34 (85%) 4.22 .121
Education status     4.03 .855
 Primary school 13 (32%) 13 (33%) 14 (35%)   
 Middle school 15 (38%) 15 (37%) 18 (45%)   
 High school 4 (10%) 4 (10%) 2 (5%)   
 Post-Secondary 8 (20%) 4 (20%) 4 (15%)   
Cigarette Smoking status
 Non-smoker 33 (83%) 35 (88%) 31 (78%) 1.39 .500
 Smoker 7 (17%) 5 (12%) 9 (22%)   
Current Alcohol Use
 Non-drinker 33 (83%) 32 (80%) 35 (88%) 0.84 .657
 Drinker 7 (17%) 8 (20%) 5 (12%)   
Pain Duration (in months) 127.4 (128.26) 139.1 (117.37) 0.18 .672
Pain-Related Interference with Daily Activities 3.45 (1.01) 3.50 (1.06) 0.05 .830