Table 1 Characteristics of Japanese women with newly diagnosed hip osteoarthritis caused by acetabular dysplasia^a

Age (years)

(n = 336)

57.7 (23.2–84.5)

Height (cm)

(n = 336)

153 (135–173)

Weight at age 20 (kg)

(n = 320)

50 (36–85)

Weight at diagnosis (kg)

(n = 336)

53 (31–105)

Weight change between age 20 and diagnosis (kg)

(n = 320)

4 (−28–40)

Body mass index at age 20 (kg/m²)

(n = 320)

20.9 (15.8–35.8)

Body mass index at diagnosis (kg/m²)

(n = 336)

22.8 (15.8–43.1)

Body mass index change between age 20 and diagnosis (kg/m²)

(n = 320)

1.6 (−13–16.7)

Presence of comorbidity

Present

(n = 335)

157 (47)

Smoking

Never

(n = 334)

265 (79)

Past

36 (11)

Current

33 (10)

Consumption of alcohol

Never

(n = 333)

202 (61)

Past

15 (5)

Current

116 (35)

Sports club activities at school

Present

(n = 334)

155 (46)

Education

Junior high school

(n = 333)

46 (14)

High school

186 (56)

Junior college or higher

101 (30)

Physical work

Present

(n = 331)

27 (8)

Parity

Present

(n = 334)

269 (81)

Clinical information

 Involved side

Hemilateral

(n = 336)

141 (42)

Bilateral

195 (58)

 Radiographic index of acetabular dysplasia

Sharp angle

(n = 255)

46 (27–58)

Acetabular roof obliquity angle

(n = 252)

23 (0–53)

Acetabular head index (%)

(n = 253)

65.5 (35.7–105.7)

 Duration since symptom onset (years)

(n = 330)

2.0 (0–43.0)

 Disease stage at OA diagnosis

Pre-OA

(n = 336)

43 (13)

Initial stage

48 (14)

Advanced stage

95 (28)

Terminal stage

150 (45)