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Table 1 Distribution of subjects among quintile groups of municipality by population density

From: Education policies to increase rural physicians in Japan: a nationwide cohort study

Category

Quintile of municipalities sorted by population density, no. (%)a

P value

RRb of 1

95% CI

1 low

2

3

4

5 high

Total

PGY-1

         

 All graduates

1805 (20.7)

1842 (21.1)

1627 (18.7)

1855 (21.3)

1582 (18.2)

8711 (100.0)

 

1.000

NA–NA

 Scholarship alone

54 (48.2)

35 (31.3)

10 (8.9)

9 (8.0)

4 (3.6)

112 (100.0)

 < 0.001

2.327

1.912–2.831

 Quota alone

34 (31.5)

21 (19.4)

24 (22.2)

18 (16.7)

11 (10.2)

108 (100.0)

0.082

1.519

1.147–2.013

 Quota with scholarship

125 (51.0)

69 (28.2)

22 (9.0)

18 (7.3)

11 (4.5)

245 (100.0)

 < 0.001

2.462

2.163–2.802

 Jichi

52 (40.9)

42 (33.1)

17 (13.4)

9 (7.1)

7 (5.5)

127 (100.0)

 < 0.001

1.976

1.597–2.445

PGY-2

         

 All graduates

1611 (19.6)

1721 (21.0)

1570 (19.1)

1704 (20.8)

1603 (19.5)

8209 (100.0)

 

1.000

NA–NA

 Scholarship alone

60 (46.2)

28 (21.5)

14 (10.8)

13 (10.0)

15 (11.5)

130 (100.0)

 < 0.001

2.352

1.943–2.846

 Quota alone

46 (35.9)

25 (19.5)

32 (25.0)

10 (7.8)

15 (11.7)

128 (100.0)

 < 0.001

1.831

1.447–2.317

 Quota with scholarship

81 (43.8)

52 (28.1)

21 (11.4)

18 (9.7)

13 (7.0)

185 (100.0)

 < 0.001

2.231

1.884–2.642

 Jichi

40 (39.6)

33 (32.7)

14 (13.9)

8 (7.9)

6 (5.9)

101 (100.0)

 < 0.001

2.018

1.580–2.578

PGY-3

         

 All graduates

1467 (17.9)

1510 (18.4)

1591 (19.4)

1722 (21.0)

1905 (23.2)

8195 (100.0)

 

1.000

NA–NA

 Scholarship alone

54 (47.4)

33 (28.9)

13 (11.4)

9 (7.9)

5 (4.4)

114 (100.0)

 < 0.001

2.646

2.169–3.229

 Quota alone

27 (28.4)

21 (22.1)

20 (21.1)

12 (12.6)

15 (15.8)

95 (100.0)

0.070

1.588

1.150–2.192

 Quota with scholarship

90 (49.7)

43 (23.8)

26 (14.4)

13 (7.2)

9 (5.0)

181 (100.0)

 < 0.001

2.778

2.382–3.239

 Jichi

89 (78.1)

9 (7.9)

8 (7.0)

1 (0.9)

7 (6.1)

114 (100.0)

 < 0.001

4.361

3.916–4.857

PGY-4

         

 All graduates

1646 (21.1)

1547 (19.8)

1446 (18.5)

1646 (21.1)

1521 (19.5)

7806 (100.0)

 

1.000

NA–NA

 Scholarship alone

59 (44.7)

49 (37.1)

15 (11.4)

6 (4.5)

3 (2.3)

132 (100.0)

 < 0.001

2.120

1.745–2.575

 Quota alone

39 (37.9)

20 (19.4)

19 (18.4)

16 (15.5)

9 (8.7)

103 (100.0)

0.001

1.796

1.397–2.308

 Quota with scholarship

85 (62.5)

28 (20.6)

12 (8.8)

6 (4.4)

5 (3.7)

136 (100.0)

 < 0.001

2.964

2.584–3.399

 Jichi

98 (88.3)

7 (6.3)

4 (3.6)

2 (1.8)

0 (0.0)

111 (100.0)

 < 0.001

4.187

3.864–4.537

PGY-5

         

 All graduates

1542 (20.9)

1467 (19.9)

1379 (18.7)

1565 (21.2)

1419 (19.2)

7372 (100.0)

 

1.000

NA–NA

 Scholarship alone

57 (53.3)

24 (22.4)

9 (8.4)

8 (7.5)

9 (8.4)

107 (100.0)

 < 0.001

2.547

2.121–3.058

 Quota alone

26 (53.1)

7 (14.3)

6 (12.2)

9 (18.4)

1 (2.0)

49 (100.0)

 < 0.001

2.537

1.942–3.313

 Quota with scholarship

46 (65.7)

13 (18.6)

6 (8.6)

1 (1.4)

4 (5.7)

70 (100.0)

 < 0.001

3.142

2.637–3.742

 Jichi

89 (84.0)

7 (6.6)

4 (3.8)

3 (2.8)

3 (2.8)

106 (100.0)

 < 0.001

4.014

3.653–4.411

Total

         

 All graduates

8071 (20.0)

8087 (20.1)

7613 (18.9)

8492 (21.1)

8030 (19.9)

40,293 (100.0)

 

1.000

NA–NA

 Scholarship alone

284 (47.7)

169 (28.4)

61 (10.3)

45 (7.6)

36 (6.1)

595 (100.0)

 < 0.001

2.383

2.186–2.598

 Quota alone

172 (35.6)

94 (19.5)

101 (20.9)

65 (13.5)

51 (10.6)

483 (100.0)

 < 0.001

1.778

1.574–2.007

 Quota with scholarship

427 (52.3)

205 (25.1)

87 (10.6)

56 (6.9)

42 (5.1)

817 (100.0)

 < 0.001

2.609

2.437–2.794

 Jichi

368 (65.8)

98 (17.5)

47 (8.4)

23 (4.1)

23 (4.1)

559 (100.0)

 < 0.001

3.287

3.086–3.500

  1. PGY postgraduate year; RR relative risk; CI confidence interval
  2. aQuintile 1 ≤ 522.7; quintile 2 ≤ 1301.0; quintile 3 ≤ 4665.3; quintile; 4 ≤ 10,492.6; quintile 5 > 10,492.6 persons per square kilometer
  3. bRelative risk of Quintile 1 against Quintiles 2–5 with "all graduates" being the reference group
  4. P value was calculated with Chi-square test with Bonferroni adjustment