Table 2 Median-split publication year by race/ethnicity for direct studies (n = 719).

From: Quantification of race/ethnicity representation in Alzheimer’s disease neuroimaging research in the USA: a systematic review

Race/Ethnicity

Time 1: 1994–2017

Time 2: 2018–2022

Median %

N

Interquartile Range

Median %

N

Interquartile Range

White

89.45%

360

71.84–96.06%

88.53%

355

71.54–94.18%

Non-Hispanic White

86.40%

128

31.40–100%

87.50%

129

50.05–99.15%

Hispanic/Latino

3.39%

133

0.00–28.34%

3.37%

148

0.00–18.39%

Black/African American

5.56%

229

0.00–25.83%

8.29%

238

2.08–27.73%

Asian American

0.00%

187

0.00–0.83%

0.00%

210

0.00–1.69%

American Indian/Alaska Native

0.00%

180

0.00%

0.00%

195

0.00%

Native Hawaiian/Other Pacific Islander

0.00%

175

0.00%

0.00%

185

0.00%

Multiracial

0.00%

176

0.00%

0.00%

184

0.00%

Some Other Race

0.00%

176

0.00%

0.00%

181

0.00%

Unknown

0.58%

360

0.00–6.54%

0.67%

357

0.00–6.58%

  1. Note. Median-split on publication year produces two time periods, 1994–2017 and 2018–2022. N represents the
  2. number of studies reporting respective race/ethnicity information. Median % represent the median study’s percentage composition for each race/ethnicity category.