Table 8.
Studies reporting association of age as a risk factor (w = weeks, m = months, y = years).
| Article | Pathogens (Diagnostic Methods) | Age Brackets (Bold Bracket Has Significant Increased Association) | Statistical Results |
|---|---|---|---|
| Abayli et al. (2021) [12] | FHV (PCR) | <12 m, 12–24 m, 25–36 m, >36 m | p < 0.01 |
| [16] | Clinical signs only | <5 m, >5 m | OR = 0.3, p < 0.01 |
| [9] | FHV, FCV, B. bronchiseptica, M. felis, C. felis (PCR, VI, BI) | 0–3 m, 4–6 m, 7–11 m, 12+ m, 72–96 m, 96+ m |
OR = 1.85 (1.25–2.74), p < 0.01
OR = 2.58 (1.24–5.41), p = 0.01 |
| [11] | FHV, FCV (VI, clinical signs) | 1–3 m, 4–11 m, 1–3 Y, 4–7 Y, >7 Y | OR = 2.9 (1.1–7.3), p = 0.03 |
| [33] | FHV, FCV (antibody titres) | <6 m, 6–11 m, 1–5 Y, >5 Y |
OR = 15.3 (1.4–392.9), p = 0.01
OR = 74.8 (10.6–1507.5), p < 0.01 OR = 194 (18.9–4840.6), p < 0.01 |
| [3] | Clinical signs only | 0–8 w, 9–15 w, 4–6 m, 7–11 m, 1–4 y, 5–10 y, 11+ y | p < 0.05 |
| [34] | B. bronchiseptica (PCR, ELISA, VI) | Age brackets not available, older cats had increased association | OR = 1.10 (1.01–1.19), p < 0.05 |
| [32] | FHV, FCV, B. bronchiseptica, M. felis, C. felis (PCR) | 6–12 m, 1–8 Y, >8 Y |
OR = 1.49 (0.67–3.31), p = 0.33
OR = 1.66 (0.78–3.55), p = 0.19 Association with clinical signs, not pathogen shedding. |
| [26] | FHV, FCV (PCR, VI) | Continuous variable, used as 2-way interaction with vaccination status | na |
| [31] | B. bronchiseptica (BI) | <6 m, >6 m | p > 0.1 |