AV1451 is in there, but there's not much because it was fully introduced in ADNI3 (
D1_D2 is up to ADNI2).
Here's some python code to find the 89 non-empty rows of the AV1451 columns in
TADPOLE_D1_D2.csv:
import pandas as pd, numpy as np
df = pd.read_csv("TADPOLE_D1_D2.csv",low_memory=False)
colz = [c for c in df.columns.tolist() if "1451" in c]
df_tmp = df.iloc[np.where((df[colz]==' ').sum(axis=1)==0)[0]][['RID','VISCODE','COLPROT','ORIGPROT']+colz].copy()