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Table 1 Comparison of demographic characteristics and number of comorbidities between the case and control group

From: Evaluation of health-related quality of life after total hip arthroplasty: a case-control study in the Iranian population

Variable Case group (n = 217) Control group (n = 217) P value*
Age (year) 58.2 ± 16.1 58.4 ± 15.9 0.4
Gender
• Female 147 (67.7) 138 (63.6) 0.12
• Male 70 (32.3) 79 (36.4)  
Marriage status
• Married 151 (69.6) 161 (74.2) 0.11
• Single 19 (8.7) 14 (6.4)  
• Divorced 9 (4.1) 10 (4.7)  
• Widowed 38 (17.6) 32 (14.7)  
Educational status
• Illiterate 19 (8.7) 13 (6) 0.09
• Under diploma 44 (20.3) 50 (23)  
• Diploma 57 (26.3) 63 (29)  
• College education 97 (44.7) 91 (42)  
Smoking history
• Positive 89 (41) 77 (35.5) 0.061
• Negative 128 (59) 140 (64.5)  
BMI (kg/m2)** 24.1 ± 3.1 23.8 ± 3.8 0.081
Number of comorbidities
• 0 59 (27.2) 61 (28.2) 0.21
• 1 98 (45.1) 101 (46.5)  
• 2 46 (21.2) 43 (19.8)  
• > 2 14 (6.5) 12 (5.5)  
  1. *Data are demonstrated as mean ± SD or number (%). P value of less than 0.05 is considered significant, **BMI body mass index