Table 4

Descriptive statistics of qualitative variables and univariate associations with seropositive status against PPR (two-tailed P-values for the χ2 – test of association).

Variable

Description

N

% of factor

% positive

P


Species

13 651

100

< 0.001

Sheep

4 211

31

8.3

Goats

4 585

33.5

9.4

Shoats*

4 855

35.5

1.9

Not available

1 000

10


Age

4 648

34

0.003

Under 1 year old

41

0.9

0

Between 1 and 2 years old

392

8.4

10.5

Between 2 and 3 years old

2 014

43.3

9.7

Over 3 years old

2 201

47.4

12.6

Not available

9 003

66


Sex

5 868

43

0.013

Males

1 007

17.2

7.0

Females

4 861

82.8

9.4

Not available

7 783

57


* Sheep and goats not being distinguished

Results of 2-tailed chi-squared tests of the hypothesis that species, age group and sex differed between positive and negative animals. A description of each variable is presented including the number and % of each category in the sampled population and the % of positive. The proportions of seropositive animals significantly differ between species, age groups and sex categories (P-value (P) < 0.05).

Waret-Szkuta et al. BMC Veterinary Research 2008 4:34   doi:10.1186/1746-6148-4-34

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