Table 1.

Participants’ demographic characteristics (N=399)

		%	J-MPAS
			Median	Interquartile	p α
Age (years)
20s	83	20.8	121.0	115.0–129.0
30s	124	31.1	128.5	118.0–139.0	<.001
40s	111	27.8	129.0	119.0–139.0
50s	80	20.0	139.0	127.5–142.0
N/A	1	0.3
Work experience (years)
< 5	82	20.6	119.5	112.8–128.3
5–10	115	28.8	127.0	117.0–138.0	<.001
11–15	52	13.0	131.5	121.3–139.8
≧16	149	37.3	136.0	125.5–142.0
N / A	1	0.3
Delivery assistance experiences (cases)
< 99	87	21.8	121.0	114.0–130.0
100–199	77	19.3	127.0	118.0–138.0	<.001
200–499	119	29.8	129.0	119.0–138.0
≧500	101	25.3	138.0	125.0–142.0
N/A	15	3.8
Workplace
Comprehensive perinatal medical center	103	25.8	132.0	120.0–140.0
Regional perinatal medical center	84	21.1	128.0	118.3–138.8	ns
General hospital	89	22.3	129.0	119.0–138.0
Clinic	122	30.6	127.0	117.8–139.3
Other	1	0.3

J-MPAS: Japanese Midwives Professional Autonomy Scale

N/A: not applicable

ns : not significant

^a Kruskal-Wallis Test