Table 1 Percentage of missing values in several variables
From: Incidence rates of the primary brain tumours in Georgia - a population-based study
Variables | Total | Missing (%) | Unclassified (%) |
|---|---|---|---|
Case numbers | 980 | 0 | - |
Age | 977 | 0.3% | - |
Sex | 916 | 6.5% | - |
Histology group | 980 | 0 | 37.8% |
Specific histology | 973 | 0.7% | 37.8% |
ICD-O morphology code | 980 | 0 | Unspecified 40.7% |
Tumor behaviour | 444 | 54.5% | - |
Tumor grade | 377 | 61.5% | - |