First quartile (n=31) | Second quartile (n=31) | Third quartile (n=31) | Fourth quartile (n=32) | P values | |

Delirium recognised | 13 (42%) | 16 (52%) | 23 (74%) | 22 (69%) | 0.03 |

Delirium as discharge diagnosis | 9 (29%) | 17 (55%) | 15 (48%) | 20 (62%) | 0.052 |

Delirium described on discharge | 18 (58%) | 14 (45%) | 12 (39%) | 18 (56%) | 0.37 |

Delirium recognition improved between the first quartile and the second, third and fourth quartile. There was a trend towards increased documentation of delirium as a discharge diagnosis between the first and the second, third and fourth quartiles.