Table 1.

Description of patients/participants.

References	Control type	Study population	Number of patients	Age (cases only)	Age (controls only)	Age measure (mean vs. median)
Pan et al. (2014)	Other	China	128	68.10	70.20
Guerrero-Preston et al. (2016)	Other	USA	42	64.00	NA	Median
Zhao et al. (2017)	Self	China	40	62.00	NA	Median
Mok et al. (2017)	Other	Malaysia	18	60.00	40.00	Mean
Mukherjee et al. (2017)	Self	USA	39	60.50	NA	Mean
Börnigen et al. (2017)	Other	USA	363	58.00	NA	Median
Perera et al. (2018)	Other	Sri Lanka	52	61.00	50.58
Takahashi et al. (2019)	Other	Japan	140	63.70	65.10	Mean
Zhang et al. (2020)	Self	China	50	60.70	NA	Mean
Zhou et al. (2020)	Self	China	24	61.10	NA	Mean
Su et al. (2021)	Self	Taiwan	74	53.96	NA	Mean