Table 1 Overview of the missing values for variables in FiksCT that were linked with national registers before and after date of integration at the municipality
Variable | Missing values | |||
|---|---|---|---|---|
Before integration | After integration | |||
Missing | % | Missing | % | |
Data in municipal FiksCT based on linkage with Norwegian Population Register# | ||||
(n = 6420) | (n = 50 190) | |||
ID | 802 | 12.5 | 782 | 1.6 |
Sex | 289 | 4.5 | 436 | 0.9 |
Date of birth | 75 | 1.2 | 181 | 0.4 |
Data in municipal FiksCT based on linkage with SYSVAK# | ||||
(n = 38 897) | (n = 6 197) | |||
Type of first vaccine | 24 344 | 62.6 | 917 | 14.8 |
Date of first vaccine | 559 | 6.2 | 78 | 2.6 |
Type of 2nd vaccine | 3 617 | 39.3 | 1 111 | 36.7 |
Date of 2nd vaccine | 270 | 5.6 | 24 | 1.7 |
Data in national MSIS register including variable submitted through FiksCT* | ||||
(n = 43 844) | (n = 21 456) | |||
Date of symptoms | 16,051 | 36.6 | 7 524 | 35.1 |
Home care admission | 20 537 | 46.8 | 3 980 | 18.6 |
Close contact | 9 239 | 21.1 | 4 221 | 19.7 |
Infected outside Norway | 14 034 | 32.0 | 5 722 | 26.7 |
Reason for test | 7 358 | 16.8 | 4 880 | 22.7 |
Underlying conditions | 13 126 | 29.9 | 5 006 | 23.3 |
Place/type of exposure | 8602 | 19.6 | 4 773 | 22.3 |