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| Subject Characteristics | Cases | Controls |
|---|---|---|
| Mean Age (years) | 60.5 (range of 43–71) | 58.6 (range of 42–65) |
| Sex (% male) | 70.5 | 69.7 |
| Race/Ethnicity | Only 1 study reported race/ethnicity as Caucasian | |
| Sample Size (mean ± standard deviation) | 25.6 ± 26.6 | 11.7 ± 6.8 |
| Representative population | None of the studies mentioned this criterion | |
