Table 1 Baseline characteristics of study group hip OA patients*

Demographics

   Age at incidence date, years

66.8 (14.0)

   Female, %

71.1

Clinical factors

   Exposure during FB, years

4.8 (2.8)

   Hip-related contact during FB, person-years, %

< 1

89.8

1-2

6.4

2 >

3.8

   Number of comorbidities during FB, %

< 2

58.1

2-4

29.2

> 4

12.8