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Table 1 Number of insertions per each parameter analyzed for each phase of the study.

From: Double–blind control of the data manager doesn't have any impact on data entry reliability and should be considered as an avoidable cost

Parameter field type phase I phase II phase III phase IV Total insertions
All - 325,773 151,734 145,401 107,286 730,194
   Male - 140,658 641,58 55,488 44,064 260,304
   Females - 185,115 87,576 89,913 63,222 362,604
Age n 2,884 1,341 1,275 946 6,446
Age at first parturition# n 1,505 712 731 514 3,462
Age marriage# n 1,505 712 731 514 3,462
Education c 2,884 1,341 1,275 946 6,446
Family position c 2,884 1,341 1,275 946 6,446
First sexual intercourse# n 1,505 712 731 514 3,462
Height n 2,884 1,341 1,275 946 6,446
Insurance c 2,884 1,341 1,275 946 6,446
Provenance c 2,884 1,341 1,275 946 6,446
Sons n 2,884 1,341 1,275 946 6,446
Number of parturitions # n 1,505 712 731 514 3,462
Urban community c 2,884 1,341 1,275 946 6,446
Weight n 2,884 1,341 1,275 946 6,446
  1. Insertions concerning only females (#), insertion-fields type: combo-boxes (c) and numeric (n).
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