Table 3 Multivariate analysis about the association between selected characteristics and disease severity at diagnosis

Age (years)

20–49

1.00

1.00

50–57

3.32 (1.61–6.87)

3.31 (1.61–6.79)

58–66

4.67 (2.15–10.2)

4.72 (2.19–10.1)

67+

12.4 (5.31–28.7)

14.6 (6.32–33.7)

(Trend P < 0.01)

(Trend P < 0.01)

Height (cm)

<150.0

1.00

1.00

150.0–153.9

0.86 (0.38–1.93)

0.93 (0.44–2.00)

154.0–157.9

0.74 (0.31–1.80)

0.76 (0.32–1.77)

158.0+

0.69 (0.28–1.70)

0.70 (0.30–1.64)

(Trend P = 0.40)

(Trend P = 0.35)

Weight at age 20 (kg)

<46.0

1.00

46.0–49.9

1.11 (0.51–2.40)

50.0–54.9

0.77 (0.36–1.65)

55.0+

1.34 (0.57–3.14)

(Trend P = 0.76)

Weight change since age 20 (kg)

<−2

1.67 (0.74–3.81)

±2

1.00

>2

2.02 (1.07–3.80)

(Trend P = 0.27)

Weight at diagnosis (kg)

<48.5

1.00

48.5–53.4

1.02 (0.49–2.13)

53.5–60.4

0.87 (0.41–1.85)

60.4+

2.07 (0.97–4.41)

(Trend P = 0.09)

Smoking

Never

1.00

1.00

Past

0.64 (0.28–1.50)

0.63 (0.28–1.45)

Current

1.57 (0.61–4.06)

1.68 (0.65–4.31)

(Trend P = 0.68)

(Trend P = 0.60)

Consumption of alcohol

Never

1.00

1.00

Past

0.61 (0.18–2.03)

0.52 (0.16–1.65)

Current

0.70 (0.39–1.25)

0.66 (0.37–1.18)

(Trend P = 0.22)

(Trend P = 0.15)

Education

Junior high school

1.00

1.00

High school

1.32 (0.72–2.41)

1.24 (0.69–2.24)

Junior college or higher

4.00 (1.49–10.7)

3.12 (1.22–8.02)

(Trend P = 0.02)

(Trend P = 0.04)

Parity

None

1.00

1.00

Present

2.19 (1.09–4.39)

2.43 (1.23–4.80)

Clinical information

Acetabular head index (%)

71.1+

1.00

1.00

60.0–71.0

1.44 (0.76–2.72)

1.83 (0.99–3.41)

<60.0

2.36 (1.23–4.53)

2.43 (1.29–4.59)

(Trend P < 0.01)

(Trend P < 0.01)

Duration since symptom onset (years)

<1.0

1.00

1.00

1.0–1.9

1.34 (0.64–2.80)

1.37 (0.67–2.82)

2.0–5.9

2.38 (1.18–4.81)

2.25 (1.14–4.44)

6.0+

2.94 (1.33–6.48)

3.05 (1.42–6.57)

(Trend P < 0.01)

(Trend P < 0.01)