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Table 2 Cohort follow-up by age in years to event, death, or censor, ALCANLink 2009 (n = 1235)

From: Quantifying sources of bias in longitudinal data linkage studies of child abuse and neglect: measuring impact of outcome specification, linkage error, and partial cohort follow-up

  [0–1) [1–2) [2–3) [3–4) [4–5) [5–6)
  N %w N %w N %w N %w N %w N %w
Follow-Up
 Subjects entering age interval outcome free 1235 (100) 1017 (84.7) 917 (75.1) 831 (68.5) 747 (61.8) 674 (56.5)
 Person-years accrued in interval 1118.4 (92.6) 968.3 (94.5) 871.3 (95.7) 788.7 (94.9) 708.6 (95.5) 325.2 (49.2)
Censoring
 Competing deaths 16 (77.8) 0 0 0 0 1 (11.1) 1 (11.1) 0 (0)
 Loss to follow-up 67 (26.5) 45 (25.3) 37 (14.0) 41 (17.9) 36 (13.4) 11 (2.9)
Outcome Ascertainment
 First multi-source reporta 135 (39.1) 54 (18.7) 48 (15.5) 42 (12.8) 36 (10.6) 12 (3.4)
 CPS only report 131 (38.2) 53 (18.9) 48 (16.0) 41 (13.1) 34 (10.3) 12 (3.5)
  1. amulti-source report is the first report of maltreatment to either Child Protective Services, Child Advocacy Center, Anchorage Police Department, or the Maternal Child Death Review