Table 1

Kaizen-Internal Medicine use stratified by postgraduate year (PGY1–3) of training and round of the competition (1–3)

TotalPGY1PGY2PGY3p Value*
Round 1Median (IQR)Median (IQR)Median (IQR) Median (IQR) 
107 questions(N=92)(N=36)(N=33)(N=23)
Questions answered†97.0 (42.0 to 107.0)97.5 (54.5 to 107.0)97.0 (23.0 to 107.0)87.0 (57.0 to 107.0)0.443
Per cent correct71.8 (61.7 to 78.9)70.2 (58.7 to 76.7)67.3 (61.0 to 75.6)78.7 (73.8 to 86.0)0.001
Days to answer4.3 (1.5 to 8.3)3.1 (1.1 to 8.2)4.0 (1.7 to 6.1)6.4 (3.1 to 12.2)0.810
Play duration‡42.0 (19.5 to 50.0)43.5 (26.0 to 50.0)39.0 (8.0 to 50.0)41.0 (30.0 to 51.0)0.210
Days between sessions‡3.1 (1.7 to 7.0)2.2 (1.5 to 3.8)4.0 (2.5 to 7.0)6.0 (3.0 to 10.0)<0.001
Questions per day†7.2 (4.0 to 11.9)4.6 (3.2 to 8.0)8.0 (5.4 to 13.4)8.8 (3.8 to 13.7)0.083
≥1 question answered‡9.0 (4.0 to 20.5)15.0 (6.5 to 26.5)7.0 (3.0 to 15.0)8.0 (4.0 to 12.0)0.080
Badges earned†2.0 (1.0 to 3.0)2.0 (1.5 to 4.0)2.0 (0.0 to 3.0)3.0 (2.0 to 4.0)0.105
Devices used†2.0 (1.0 to 3.0)2 .0 (1.0 to 3.0)2.0 (1.0 to 3.0)2.0 (1.0 to 3.0)0.811
Round 2§Median (IQR)Median (IQR)Median (IQR)Median (IQR) 
84 questions(N=90)(N=42)(N=32)(N=16)
Questions answered†65.5 (36.0 to 84.0)57.0 (36.0 to 84.0)69.0 (29.5 to 84.0)83.0 (54.0 to 84.0)0.482
Per cent correct66.7 (57.7 to 73.8)68.6 (65.0 to 74.2)63.1 (54.4 to 66.7)66.1 (58.9 to 82.1)0.025
Days to answer5.8 (1.7 to 11.4)5.9 (1.7 to 13.5)6.1 (1.8 to 14.6)3.8 (1.0 to 8.1)0.429
Play duration‡34.0 (18.0 to 40.0)35.0 (18.0 to 40.0)32.0 (15.0 to 39.5)33.0 (23.5 to 40.5)0.752
Days between sessions‡3.7 (1.8 to 7.0)4.4 (2.2 to 7.8)3.7 (1.7 to 7.1)3.0 (1.8 to 4.4)0.281
Questions per session*6.5 (3.7 to 10.5)7.6 (4.0 to 11.3)6.1 (3.3 to 9.8)5.6 (3.7 to 10.1)0.564
≥1 question answered‡8.5 (3.0 to 18.0)7.5 (3.0 to 18.0)8.0 (2.5 to 17.0)10.5 (5.5 to 20.0)0.919
Badges earned†2.0 (1.0 to 2.0)1.0 (1.0 to 2.0)1.0 (0.0 to 2.0)2.0 (1.5 to 3.0)0.124
Devices used†2.0 (1.0 to 2.0)2.0 (1.0 to 2.0)1.5 (1.0 to 3.0)1.5 (1.0 to 2.5)0.873
Round 3Median (IQR)Median (IQR)Median (IQR)Median (IQR) 
117 questions(N=55)(N=25)(N=22)(N=8)
Questions answered†108.0 (31.0 to 117.0)117.0 (72.0 to 117.0)58.0 (8.0 to 117.0)73.0 (38.0 to 114.0)0.049
Per cent correct60.3 (50.4 to 71.4)62.9 (54.2 to 72.7)55.0 (50.0 to 71.4)62.3 (57.0 to 65.6)0.471
Days to answer5.0 (1.2 to 17.2)4.5 (1.1 to 17.2)7.7 (2.3 to 18.9)2.3 (0.5 to 10.2)0.335
Play duration‡30.0 (5.0 to 38.0)34.0 (18.0 to 37.0)16.0 (4.0 to 33.0)35.5 (3.5 to 40.0)0.187
Days between sessions‡2.6 (1.5 to 4.7)2.4 (1.6 to 4.4)3.3 (1.6 to 5.7)2.2 (1.3 to 3.8)0.589
Questions per day†7.3 (4.4 to 13.3)10.3 (5.1 to 14.6)6.7 (3.5 to 9.8)7.5 (4.5 to 14.7)0.451
≥1 question answered‡6.0 (2.0 to 16.0)8.0 (3.0 to 17.0)4.0 (2.0 to 13.0)7.0 (2.5 to 20.5)0.544
Badges earned†2.0 (0.0 to 4.0)3.0 (2.0 to 4.0)1.0 (0.0 to 2.0)1.5 (0.5 to 2.5)0.037
Devices used†1.0 (1.0 to 2.0)1.0 (1.0 to 2.0)1.0 (1.0 to 2.0)1.0 (1.0 to 1.5)0.402
  • *Type 3 p values from separate Poisson regression models modelling the count by trainee level.

  • †Per participant.

  • ‡Unit is days.

  • §A total of 26 new players were added in round 2.