Frequencies of the five types of improper cause-of-death (COD) statements among death certificates issued in two medical centres in Tainan, Taiwan, 2009
| N (%) | (%) | |
| Total death certificates | 2520 (100.0) | |
| Proper COD statements | 2018 (80.1) | |
| Improper COD statements | 502 (19.9) | (100.0) |
| Type 1: one correct causal sequence and one unspecific COD reported on the lowest used line | 210 (8.3) | (41.8) |
| Type 2: two or more correct causal sequences reported | 57 (2.3) | (11.4) |
| Type 3: incorrect causal sequence reported | 91 (3.6) | (18.1) |
| Type 4: only mechanism(s) of death reported | 144 (5.7) | (28.7) |