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Table 2 Comparisons of covariates before and after matching (N = 54,398)

From: Does academic interest play a more important role in medical sciences than in other disciplines? A nationwide cross-sectional study in China

Variables   Mean   Reduction |bias| % t-test
Treated Control %bias t p > t
Male U 0.477 0.503 −5.3 86.1 −5.34 0.000
M 0.477 0.473 0.7 0.97 0.333
Method of admission – First choice U 0.596 0.497 19.9 99.5 20.04 0.000
M 0.596 0.595 0.1 0.13 0.896
Academic track of high school-Science U 0.652 0.728 −16.3 94.2 −16.13 0.000
M 0.652 0.648 1.0 1.20 0.231
College entrance examination score U 86.111 86.260 −1.1 43.0 − 1.11 0.268
M 86.118 86.330 −1.6 −2.07 0.038
Grade-Sophomores U 0.264 0.281 −3.9 97.1 −3.91 0.000
M 0.264 0.264 0.1 0.15 0.881
Grade-Juniors U 0.238 0.256 −4.1 88.6 −4.16 0.000
M 0.238 0.240 −0.5 −0.62 0.535
Grade-Seniors U 0.170 0.142 7.7 88.2 7.56 0.000
M 0.170 0.173 −0.9 −1.14 0.256
Educational attainment - Fathers U 10.594 10.319 7.8 82.3 7.83 0.000
M 10.594 10.545 1.4 1.79 0.073
Educational attainment - Mothers U 9.318 8.959 8.8 88.7 8.86 0.000
M 9.317 9.277 1.0 1.30 0.193
ISEI of the father U 31.193 30.376 4.4 66.3 4.37 0.000
M 31.186 30.912 1.5 1.91 0.056
ISEI of the mother U 27.106 26.312 5.0 71.5 5.01 0.000
M 27.102 26.875 1.4 1.84 0.065
Family economic status – Middle U 0.333 0.340 −1.4 82.2 −1.36 0.175
M 0.333 0.335 −0.2 −0.31 0.753
Family economic status – High U 0.114 0.107 2.0 54.2 1.98 0.047
M 0.114 0.111 0.9 1.18 0.239
Home location – Urban area U 0.455 0.435 4.0 74.4 4.02 0.000
M 0.455 0.450 1.0 1.34 0.181
  1. Note: ISEI International Socio-Economic Index of occupational status. U Unmatched, M Matched