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Table 2 Relationship between predictor variables and quality of care (t-scores) according to univariate and multivariable analyses

From: Quality of care associated with number of cases seen and self-reports of clinical competence for Japanese physicians-in-training in internal medicine

Predictor Variable

Univariate Analysis

Multivariate Analysis

 

Mean t-score

2SD

P Value*

Mean t-score

2SD

P Value

Institution affiliation

  

<0.0001

  

<0.0001

   Type A+

55.5

2.1

 

40.8

5.9

 

   Type B

47.5

4.5

 

47.8

4.2

 

Post-graduation year

  

0.0317

  

0.6942

   PGY1

48.6

1.6

---

40.8

5.9

---

   PGY2

51.0

4.4

0.09

39.9

11.1

0.468

   PGY3 and beyond

53.6

5.3

0.007

41.5

8.8

0.992

Number of cases seen

  

<0.0001

  

0.0005

   0–100

45.4

2.4

---

40.8

5.9

---

   101–200

49.4

6.3

0.041

48.0

10.4

0.001

   201–300

52.4

6.6

0.001

47.6

11.2

0.002

   301–400

51.9

7.1

0.006

48.8

10.9

0.011

   401–600

54.7

6.6

<0.0001

50.1

12.3

0.001

   601–800

55.3

7.5

<0.0001

49.8

12.8

0.004

   >800

53.9

6.5

<0.0001

45.4

9.5

0.01

Proportion of in-patient cases

-0.907†

 

0.1882

  

0.009

Self-reports of clinical competence (/15)

  

<0.0001

  

0.0095

   Low

45.7

2.3

---

40.8

5.9

---

   Middle

49.8

5.4

0.009

45.4

9.5

0.013

   High

52.9

5.3

<0.0001

46.4

9.5

0.002

Common Disease Index (CDI)

  

0.2287

  

0.4962

   Low

51.8

2.5

---

40.8

5.9

---

   Middle

49.9

5.9

0.247

40.2

9.2

0.718

   High

49.1

5.7

0.087

42.0

9.7

0.543

  1. + Type of institution (i.e., university-affiliated or non-university-affiliated teaching hospitals) is kept confidential; thus A and B were used without revealing specific identity.
  2. * P-values for student t-test and ANOVA
  3. † Pearson correlation coefficient