|
Risk categories
|
Alive
|
Dead
|
Univariable model
|
Multivariable model
|
|---|
|
n
|
%
|
n
|
%
|
OR
|
95%-CI
|
p
|
OR
|
95%-CI
|
pb
|
|---|
|
Low
|
Up
| | |
Low
|
Up
| |
|---|
|
Total
|
372
|
71.68
|
147
|
28.32
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
|
Herd/group (p = 0.0033) a
|
|
11(ref)
|
26
|
56.52
|
20
|
43.48
|
1
|
x
|
x
|
x
|
1
|
x
|
x
|
x
|
|
12
|
27
|
65.85
|
14
|
34.15
|
0.674
|
0.282
|
1.609
|
0.3741
|
0.229
|
0.053
|
0.984
|
0.4722
|
|
13
|
19
|
51.35
|
18
|
48.65
|
1.232
|
0.516
|
2.937
|
0.6386
|
0.618
|
0.145
|
2.636
|
0.2897
|
|
21
|
33
|
73.33
|
12
|
26.67
|
0.473
|
0.196
|
1.141
|
0.0956
|
0.281
|
0.074
|
1.071
|
0.7145
|
|
22
|
25
|
60.98
|
16
|
39.02
|
0.832
|
0.353
|
1.959
|
0.6738
|
0.845
|
0.239
|
2.989
|
0.0373
|
|
23
|
38
|
74.51
|
13
|
25.49
|
0.445
|
0.189
|
1.049
|
0.0643
|
0.326
|
0.086
|
1.232
|
0.9287
|
|
31
|
26
|
83.87
|
5
|
16.13
|
0.250
|
0.082
|
0.767
|
0.0153
|
0.083
|
0.014
|
0.479
|
0.0451
|
|
32
|
35
|
87.50
|
5
|
12.50
|
0.186
|
0.062
|
0.560
|
0.0028
|
0.212
|
0.048
|
0.933
|
0.4034
|
|
33
|
38
|
95.00
|
2
|
5.00
|
0.068
|
0.015
|
0.318
|
0.0006
|
0.102
|
0.017
|
0.627
|
0.1074
|
|
41
|
43
|
82.69
|
9
|
17.31
|
0.272
|
0.108
|
0.686
|
0.0058
|
0.195
|
0.055
|
0.687
|
0.2282
|
|
42
|
28
|
66.67
|
14
|
33.33
|
0.650
|
0.273
|
1.547
|
0.3301
|
1.523
|
0.430
|
5.394
|
0.0005
|
|
43
|
34
|
64.15
|
19
|
35.85
|
0.726
|
0.323
|
1.632
|
0.4390
|
0.401
|
0.117
|
1.369
|
0.6833
|
|
Body weight (p = 0.0418) a
|
|
≤ 0.86 kg
|
69
|
41.07
|
99
|
58.93
|
23.475
|
11.870
|
46.424
|
< .0001
|
3.715
|
1.103
|
12.507
|
0.1221
|
|
0.86–1 kg
|
123
|
76.88
|
37
|
23.13
|
4.922
|
2.417
|
10.023
|
< .0001
|
2.973
|
1.238
|
7.140
|
0.1885
|
|
> 1 kg (ref)
|
180
|
94.24
|
11
|
5.76
|
1
|
x
|
x
|
x
|
1
|
x
|
x
|
x
|
|
Vitality score (p ≤ .0001) a
|
|
0 (ref)
|
296
|
90.80
|
30
|
9.20
|
1
|
x
|
x
|
x
|
1
|
x
|
x
|
x
|
|
1
|
74
|
54.41
|
62
|
45.59
|
8.265
|
4.989
|
13.694
|
< .0001
|
3.325
|
1.589
|
6.958
|
0.0710
|
|
2
|
2
|
3.51
|
55
|
96.49
|
271.333
|
63.013
|
1168.351
|
< .0001
|
61.358
|
10.609
|
354.867
|
< .0001
|
|
Intrauterine growth retardation score (p = 0.1765) a
|
|
0 (ref)
|
274
|
88.10
|
37
|
11.90
|
1
|
x
|
x
|
x
|
1
|
x
|
x
|
x
|
|
1
|
86
|
63.24
|
50
|
36.76
|
4.305
|
2.640
|
7.022
|
< .0001
|
1.582
|
0.656
|
3.814
|
0.6534
|
|
2
|
12
|
16.67
|
60
|
83.33
|
37.027
|
18.231
|
75.201
|
< .0001
|
3.412
|
0.929
|
12.538
|
0.0678
|
|
Rectal temperature (p = 0.0003) a
|
|
≤ 37.5 °C
|
48
|
32.21
|
101
|
67.79
|
14.818
|
9.336
|
23.519
|
< .0001
|
3.372
|
1.745
|
6.517
|
0.0003
|
|
> 37.5 °C (ref)
|
324
|
87.57
|
46
|
12.43
|
1
|
x
|
x
|
x
|
1
|
x
|
x
|
x
|
|
Sex (p = 0.0680)a
|
|
Female (ref)
|
187
|
73.91
|
66
|
26.09
|
1
|
x
|
x
|
x
|
1
|
x
|
x
| |
|
Male
|
185
|
69.55
|
81
|
30.45
|
1.241
|
0.846
|
1.820
|
0.2704
|
1.712
|
0.961
|
3.049
|
0.0680
|
- Due to missing values vitality scores 2 and 3 were aggregated to one category for modelling purposes
- ref, reference category; OR, odds ratio estimate; CI, confidence limits; p, level attained for the statistical test associated
- aGeneral p value Wald’s Chi2-test (p < 0.05 are marked in bold)
- bp value Wald’s Chi2-test (p < 0.05 are marked in bold) to the reference category
