TABLE 1.

Bivariate Comparison of Rheumatologists

Pediatric Only (n = 20; % or Mean [SD])Unadjusted P Pediatric vs All InternistsInternists Involved In Care of Children (n = 78; % or Mean [SD])Internists Only (n = 134; % or Mean [SD])Unadjusted P Value* Internists Who Treat Children vs Internists Only
Personal characteristics
 Male50.0.0467.675.2NS
 Age49.3 (7.6)NS50.7 (9.2)51.5 (11.3)NS
 Nonwhite5.0.0521.325.8NS
 Years in practice16.0 (8.7)NS17.2 (9.3)17.9 (11.1)NS
Training characteristics
 Exposure to pediatrics during fellowship
  None5.3N/A17.824.6NS
  Minimal5.348.040.2
  Moderate5.326.031.2
  Extensive84.28.24.1
Practice characteristics
 Practice setting
  Private practice15.0<.00153.352.3.076
  Academic rheumatology50.014.722.0
  HMO0.010.715.2
  Multispecialty clinic15.020.07.6
  Other20.01.33.0
 Percentage of time in professional activities
  Rheumatology care58.3 (30.6).0277.9 (25.4)68.9 (30.9).07
  Primary care5.6 (21.3).085.1 (12.7)9.2 (19.1)NS
  Research14.9 (20.3)<.0017.2 (18.6)9.2 (21.4)NS
  Teaching12.7 (20.1)<.0013.8 (6.6)3.7 (5.9)NS
  Other8.4 (8.3).065.9 (10.8)8.9 (16.5)NS
 Patients’ insurance status
  Medicaid37.5 (25.1)<.0018.2 (10.9)11.5 (16.1)NS
  Private insurance48.2 (22.5)NS49.8 (21.7)44.9 (24.6)NS
  Medicare7.3 (16.5)<.00134.0 (16.3)34.4 (18.4)NS
  Self-pay/uninsured5.2 (6.3)NS5.7 (8.7)5.7 (10.8)NS
  Other3.3 (11.5)NS4.9 (18.5)9.7 (27.0)NS
 Hours worked per week47.6 (19.8)NS48.6 (15.7)49.2 (16.4)NS
 Total patients seen per week34.5 (23.4)<.00176.6 (42.2)67.1 (44.0)NS
 Patients <18 seen per week27.5 (18.0)<.0013.1 (3.6)1.7 (5.2)<.001
 Able to see more patients35.0NS26.736.1NS
 Miles to nearest pediatric rheumatologistN/A30.2 (34.8)15.3 (18.0)<.001
  • SD indicates standard deviation; NS, not significant; HMO, health maintenance organization.

  • * For dichotomous variables, statistical tests were performed using χ2 when all cell sizes were >5. When ≥1 cells were <5, a 2-sided Fisher exact test was used. For continuous variables, 2-sided t tests were performed without assuming equal variances. For nonnormally distributed variables (Shapiro-Wilks test P < .05), Wilcoxon rank sum tests were used.