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. Author manuscript; available in PMC: 2017 Apr 11.
Published in final edited form as: Stat Methods Med Res. 2014 Apr 16;25(6):2634–2649. doi: 10.1177/0962280214529932

Figure 2.

Figure 2

Percentages and counts of missingness per variable using in the PATH participant data. given that there is a set of walks from which a person chooses then if we denote the walk date as tj, j = 1, …, M then we can denote yij as a binary indicator for the ith individual at the jth walk time (tj). We can assume that at this data level we have