Table 1 Variables used for matching WNV infected subjects to uninfected subjects
Index date | Death date | |
|---|---|---|
Hard-matched variables | ||
Index date | ±30 days | N/A |
Death date | N/A | ±90 days |
Age | ±1 year | ±5 years |
Sex | Exact | Exact |
Propensity score variables | ||
Rurality Index of Ontario (RIO) | At index date | 180 days prior to death |
Neighbourhood income quintile | At index date | 180 days prior to death |
Johns Hopkins ACG® System - collapsed aggregated diagnosis groups (CADG) | 2 years prior to index date | 180 days prior to death |