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Table 3 Sequences of Non-missing Monthly Statusa

From: Improving knowledge about disability transitions by adding retrospective information to panel surveys. Population Health Metrics

  Observations with One or More Sequences Number of Sequences per Observation Length of Sequences
  % of Nb Mean (SD) Max Mean (SD) Median Min Max
  Sparsec Dense Densed Sparse Dense Sparsee Dense Sparse Dense Both Sparse Dense
ADL             
Eating 1.16 19.45 1.044 (0.212) 1 3 2.00 4.79 (10.71) 2 2 2 2 133
I/O Bedf 1.16 25.87 1.091 (0.296) 1 3 2.00 13.86 (22.74) 2 2 2 2 164
Mobility 1.10 28.98 1.12 (0.339) 1 3 2.00 18.12 (27.85) 2 6 2 2 190
Dressing 1.08 23.72 1.071 (0.272) 1 3 2.00 11.34 (20.42) 2 2 2 2 133
Bathing 1.08 30.55 1.118 (0.339) 1 3 2.00 19.73 (27.98) 2 6 2 2 158
Toileting 1.13 24.01 1.083 (0.280) 1 3 2.00 11.86 (20.76) 2 2 2 2 141
  1. aMonthly STATUSt followed by STATUSt+1, where STATUS is nonmissing, through month of death where available. Data columns 3–10 restricted to observations having such sequences. SD = Standard Deviation.
  2. bN = 3440.
  3. cSparse = sparse data; Dense = dense data; See text for definitions. Sequences of non-missing monthly status information are available in sparse data only in instances when a month of interview is followed immediately by the month of death.
  4. dMean number of sequences in sparse data observations having a sequence is 1 in all instances.
  5. eStandard deviation not applicable to sparse data sequence length.
  6. fI/O Bed = Getting in or out of bed.