Table 1.

Percentage present or missing cognitive data at baseline and follow‐up observations

	Baseline	Follow‐up
Available observations	53,880	37,491
MMSE score present	>99%	68%
26–30 (very mild)	18%	17%
21–25 (mild)	40%	38%
16–20 (mild‐moderate)	27%	28%
11–15 (moderate)	11%	12%
6–10 (severe)	3%	5%
0–5 (very severe)	<1%	<1%
MMSE untestable	<1%	8%
MMSE missing	<1%	24%
Global cognition present	0%	95%
MMSE missing (or untestable) and global cognition missing	<1%	2%

Abbreviation: MMSE, Mini‐Mental State Examination.