Table 1 Overview of discrepant results among all data entered, and among discrepant results: number of blanks, out of range entries and logical errors
From: Analysis of erroneous data entries in paper based and electronic data collection
Variable type | No. of variables | All | Among contradictory entries | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Contradictory entries/total (%) | Blanks in Epidata/total (%) | Blanks in AKVO/total (%) | p blanks | Epidata: out of range entries/total (%) | AKVO: out of range entries/total (%) | p out of range entries | Epidata: logical errors/total (%) | AKVO: logical errors/total (%) | p logical errors | ||
Date | 3 | 13.0% (140/1074) | 0.0% (0/140) | 52.9% (74/140) | < 0.001 | 0.0% (0/140) | 0.7% (1/140) | 0.317 | 0.0% (0/140)a | 0.7% (1/140)a | 0.317 |
Time | 2 | 15.8% (113/716) | 0.0% (0/113) | 0.0% (0/113) | 1.000 | 0.0% (0/113) | 0.0% (0/113) | 1.000 | NA | NA | – |
Categorical | 35 | 10.9% (1370/12,530) | 60.1% (823/1370) | 23.7% (325/1370) | < 0.001 | NA | NA | – | NA | NA | – |
Continuous | 10 | 18.0% (643/3580) | 26.9% (178/643) | 14.1% (91/643) | < 0.001 | 0.2% (1/643) | 0.0% (0/643) | 0.317 | 0.0% (0/643)b | 0.2% (1/643)b | 0.317 |
Text | 2 | 12.0% (86/716) | 1.2% (1/86) | 8.1% (7/86) | 0.034 | NA | NA | – | NA | NA | – |
Total | 52 | 12.6% (2352/18,616) | 42.6% (1002/2352) | 21.1% (497/2352) | < 0.001 | 0.1% (1/896) | 0.1% (1/896) | 1.000 | 0.0% (0/783) | 0.1% (1/783) | 0.318 |