Table 1

 Study groups—baseline characteristics

CriteriaIbuprofen group (n = 111)Paracetamol group (n = 111)
ACR, American College of Rheumatology; SD, standard deviation; VAS, visual analogue scale.
Age (years), mean (SD)66.5 (9.6)66.4 (8.9)
Female, No (%)81 (73)81 (73)
Weight (kg), mean (SD)74.1 (12.5)74.1 (13.6)
Height (cm), mean (SD)162.8 (8.6)162.6 (7.9)
Body mass index (kg/m2), mean (SD)28.1 (4.5)27.9 (4.3)
Disease duration (years), mean (SD)4.8 (5.6)4.5 (5.3)
Osteoarthritis localisation:
    Hip, No (%)29 (26)37 (33)
    Knee, No (%)82 (74)74 (67)
        Femorotibial, No (%)48 (59)40 (54)
        Femoropatellar, No (%)16 (20)17 (23)
        Femorotibial and femoropatellar, No (%)18 (22)17 (23)
Pain intensity (VAS, mm), mean (SD)71.3 (10.4)72.2 (11.0)
Diagnosis according to ACR criteria, No (%)111 (100)111 (100)