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Table 2 Baseline information for each group at individual (student) and cluster (tutor) levels.

From: The effect of a brief social intervention on the examination results of UK medical students: a cluster randomised controlled trial

  Intervention group n = (%) Control group n = (%) Total n = (%) Group differences p value
Total n = (%)Tutor factors at baseline
Total 6 6 12 n/a n/a
male 1 (16.7) 2 (33.3) 3 (25.0) n/a n/a
white 6 (100.0) 5 (83.3) 11 (91.7) n/a n/a
Student factors at baseline
Total 177/348 (50.9) 171/348 (49.1) 348 (100.0)   
Mean age 22 yrs 4 months 22 yrs 4 months 22 yrs 4 months t(346) = 0.8 0.94
white* 80/175 (45.7) 87/166 (52.5) 167/341 (49.0) χ2 = 1.9; df = 3 0.60
Asian Indian, Pakistani, Bangladeshi 47/175 (26.9) 37/166 (22.3) 84/341 (34.0) χ2 = 1.9; df = 3 0.60
Chinese 16/175 (9.1) 12/166 (7.2) 28/341 (8.2) χ2 = 1.9; df = 3 0.60
All Other 32/175 (18.3) 30/166 (18.1) 62/341 (18.2) χ2 = 1.9; df = 3 0.60
Male** 69/176 (39.2) 59/171 (34.5) 128/347 (36.9) χ2 = 0.8; df = 1 0.36
Graduate entry*** 23/176 (13.1) 20/166 (12.1) 43/342 (12.6) χ2 = 0.1; df = 1 0.75
With iBSC*** 107/176 (60.8) 101/166 (60.8) 208/342 (60.8) χ2 = 0.2; df = 1 0.89
Oxford or Cambridge transfer 21/177 (11.9) 30/171 (17.5) 51/348 (14.7) χ2 = 2.2; df = 1 0.13
Mean pre-intervention written z score 0.05 (SD = 1.0) -0.05 (SD = 1.0) 0.00 (SD = 1.0) t(343) = -0.9 0.36
Mean Neuroticism score 8.1 (SD = 2.3) 7.8 (SD = 2.3) 8.0 (SD = 2.3) t(270) = -0.8 0.45
Mean Conscientiousness score 11.3 (SD = 2.6) 11.3 (SD = 2.0) 11.3 (SD = 2.3) t(272) = 0.2 0.86
Mean Openness score 11.1 (SD = 2.2) 10.9 (SD = 2.4) 11.0 (SD = 2.3) t(272) = -0.9 0.39
Mean Agreeableness score 13.3 (SD = 1.6) 13.0 (SD = 1.6) 13.2 (SD = 1.6) t(268) = -1.8 0.07
Mean Extraversion score 11.6 (SD = 2.1) 11.6 (SD = 1.8) 11.6 (SD = 1.9) t(271) = -0.13 0.90
Mean Surface study score 14.9 (SD = 3.9) 14.7 (SD = 3.4) 14.8 (SD = 3.6) t(265) = -0.5 0.61
Mean Strategic study score 18.5 (SD = 5.4) 17.7 (SD = 4.7) 18.1 (SD = 5.1) t(266) = -0.8 0.45
Mean Deep study score 19.4 (SD = 4.1) 19.3 (SD = 3.9) 19.3 (SD = 4.0) t(267) = -0.3 0.79
Mean GHQ (stress) score 11.4 (SD = 5.3) 10.2 (SD = 4.4) 10.8 (SD = 4.9) t(262) = -1.9 0.06
  1. * missing n = 7
  2. ** missing n = 1
  3. *** missing n = 6 for graduate and iBSc combined (graduates do not take an iBSc)