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Table 4 Results of three outcome variables of career development before and after multiple imputation

From: Sample attrition analysis in a prospective cohort study of medical graduates in China

Variables CSP (N=1233) NCSP (N=947)
Before imputation After imputation P-value# Before imputation After imputation P-value#
Income of current job 4022.8 (3868.9) 4065.3 (3555.9) 0.104 6456.1 (5267.2) 6420.9 (4269.9) 0.714
Missing 301 36   547 61  
Whether passing the NMLE
  No 59 (6.2%) 80 (6.7%) 0.148 51 (9.3%) 91 (10.1%) 0.329
  Yes 893 (93.8%) 1110 (93.3%)   496 (90.7%) 809 (89.9%)  
  Missing 271 33   400 47  
Whether obtained a professional title
  No 362 (38.0%) 456 (38.3%) 0.676 322 (58.9%) 527 (58.6%) 0.814
  Yes 590 (62.0%) 734 (61.7%)   225 (41.1%) 373 (41.4%)  
  Missing 271 33   400 47  
  1. Notes: (1) Source: Compulsory Services Program 2015-2017 wave; (2) Mean and standard deviation are reported for income; N and column % are reported for categorical variables; (3) The P-value was obtained by comparing data before imputation and the imputed data, not with the total data after imputation. T-test was used to examine the differences of “income of current job”, and Chi-square test was used for “whether passing the NMLE” and “whether obtained a professional title”; (4) NMLE China National Medical Licensing Examination; CSP compulsory services program, NCSP non-compulsory services program