Smart phone | Pen and paper | ||||||
---|---|---|---|---|---|---|---|
Question type | Total number of questions assessed | Number of errors/incomplete/inconsistent records (%) | Total number of questions assessed | Number of errors/incomplete/inconsistent records (%) | Adjusted IRR* | p value | 95% CI |
Questions requiring responses without programmed checks on the smartphone version | |||||||
Incomplete records | |||||||
Questions on clinical symptoms | 11,440 | 11 (0.1) | 11,440 | 54 (0.5) | 4.2 | <0.01 | 2.1-8.3 |
Questions assessing past medical history | 1,760 | 6 (0.3) | 1,760 | 5 (0.3) | 0.9 | 0.82 | 0.3-2.9 |
Questions on exposure history | 3,520 | 6 (0.2) | 3,520 | 108 (3.1) | 17.4 | <0.01 | 7.6-39.8 |
Questions on vital signs | 1,760 | 2 (0.1) | 1,760 | 14 (0.8) | 5.6 | 0.03 | 1.2-26.3 |
Total | 18,480 | 25 (0.1) | 18,480 | 181 (1.0) | 7 | <0.01 | 4.4-10.3 |
Errors and inconsistent answers | |||||||
Questions assessing past medical history | 243 | 1 (0.4) | 227 | 178 (78.4) | 200 | <0.01 | 28.0-1431.2 |
Questions on exposure history | 6 | 2 (33.3) | 6 | 3 (50.0) | 1 | 0.86 | 0.2-8.2 |
Questions on vital signs | 1,760 | 5 (0.3) | 1,760 | 5 (0.3) | 1 | 0.48 | 0.2-2.4 |
Total | 2,009 | 8 (0.4) | 1,993 | 186 (8.3) | 25 | <0.01 | 12.5-51.8 |
Questions requiring responses with programmed checks on the smartphone version | |||||||
Date of interview | - | - | 880 | 0 (0) | - | - | - |
Case classification | - | - | 880 | 2 (0.2) | - | - | - |
Gender | - | - | 880 | 2 (0.2) | - | - | - |
Pregnant if female | - | - | 9 | 6 (66.7) | - | - | - |
Total | - | - | 2,649 | 10 (0.4) | - | - | - |