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Table 4 Categorical variables of ‘infection data’ and their levels collected from 1,127 piglets

From: Individual risk factors for Mycoplasma hyopneumoniae infections in suckling pigs at the age of weaning

Variable Level All piglets Mhyo neg. Mhyo pos.
   (n) (%)1 n (%)2 n (%)2
Vaccine against M. hyopneumoniae Suvaxyn® M. hyo 386 34.3 361 (33.2) 25 (61.0)
Ingelvac® M. hyo 441 39.2 427 (39.3) 14 (34.1)**
Porcilis® M hyo 298 26.5 296 (27.3) 2 (4.9)**
Vaccination against PCV2 No 310 27.5 308 (28.4) 2 (4.9)
Yes 817 72.5 778 (71.6) 39 (95.1)*
Diseases No 701 62.2 674 (62.1) 27 (65.9)
Local diseases 15 1.3 15 (1.4) 0 (0.0)
Systemic diseases 146 13.0 143 (13.2) 3 (7.3)
Respiratory diseases 265 23.5 254 (23.4) 11 (26.8)
Routine treatment in the 1st week of life Amoxicillin 386 34.3 361 (33.2) 25 (61.0)
Toltrazuril & penicillin 441 39.1 427 (39.3) 14 (34.1)**
Long-lasting amoxicillin 300 26.6 298 (27.4) 2 (4.9)**
Routine treatment in the 2nd week of life Long-lasting penicillin 441 66.0 427 (60.7) 14 (93.3)
Amoxicillin & tulathromycin 277 34.0 276 (39.3) 1 (6.7)**
Routine treatment in the 3rd week of life Tulathromycin 441 100.0 427 (100) 14 (100)
Any treatment against M. hyopneumoniae No 408 36.2 382 (35.2) 26 (63.4)
Yes 719 63.8 704 (64.8) 15 (36.6)*
Level of antibodies against M. hyopneumoniae S/P ratio < 0,4 799 70.9 769 (70.8) 30 (73.2)
  S/P ratio ≥ 0,4 328 29.1 317 (29.2) 19 (26.8)
  1. Using PCR results from suckling pigs’ nasal swabs as a binomial outcome variable, the incidence rate ratio (IRR; recognizing the first level of each variable as baseline in a univariable Poisson regression analysis) were calculated. Significant differences are indicated with asterisks.
  2. if applied.
  3. 1 column-percent.
  4. 2 row–percent.
  5. * P-value of IRR <0.05.
  6. ** P-value of IRR <0.01.