Factors associated with diagnostic stage of hip osteoarthritis due to acetabular dysplasia among Japanese female patients: a cross-sectional study

Table 4 Comparison of selected characteristics between perfect and imperfect responders

Characteristics		No. of missing data	n (%) or median (range)		P
Characteristics		No. of missing data	Perfect responders (N = 234)	Imperfect responders (N = 102)	P
Age (years)		0	56.0 (23.2–84.5)	59.3 (24.1–82.0)	0.02
Height (cm)		0	154 (138–173)	153 (135–172)	0.09
Weight at age 20 (kg)		16	50 (36–85)	48 (37–70)	0.30
Weight change since age 20 (kg)		16	4 (−28–40)	3.5 (−14–35)	0.51
Weight at diagnosis (kg)		0	54 (31–88)	52 (35–105)	0.02
Body mass index at age 20 (kg/m²)		16	20.9 (16.4–35.8)	20.8 (15.8–28.8)	0.64
Body mass index change since age 20 (kg/m²)		16	1.6 (−13.0–16.7)	1.4 (−6.3–14.3)	0.50
Body mass index at diagnosis (kg/m²)		0	22.9 (15.8–38.1)	22.05 (17.8–43.1)	0.18
Smoking	Never	2	188 (80)	77 (77)	0.69
	Past		25 (11)	11 (11)
	Current		21 (9)	12 (12)
Consumption of alcohol	Never	3	141 (60)	61 (62)	0.95
	Past		11 (5)	4 (4)
	Current		82 (35)	34 (34)
Education	Junior high school	3	32 (14)	14 (14)	0.95
	High school		132 (56)	54 (55)
	Junior college or higher		70 (30)	31 (31)
Parity	Present	2	189 (81)	80 (80)	0.87
Clinical information
Involved side	Hemilateral	0	100 (43)	41 (40)	0.66
	Bilateral		134 (57)	61 (60)
Radiographic index of acetabular dysplasia
	Sharp angle	81	46 (27–58)	45 (39–54)	0.81
	Acetabular roof obliquity angle	84	23 (0–53)	25 (12.5–43.0)	0.48
	Acetabular head index (%)	83	65.6 (35.7–105.7)	65 (40.9–85.7)	0.77
Duration since symptom onset (years)		6	1.5 (0–40.0)	2.0 (0–43.0)	<0.01
Disease stage at OA diagnosis
	Pre-OA	0	39 (17)	4 (4)	<0.01
	Initial stage		37 (16)	11 (11)
	Advanced stage		77 (33)	18 (18)
	Terminal stage		81 (35)	69 (68)

*P value was calculated by Wilcoxon rank sum test for continuous variables or the Chi-square test for categorical variables

ISSN: 1471-2474