Table 1

Baseline characteristics of both treatment groups
Baseline data Fish oil Placebo (corn oil) P-value
Total no of subjects (finished the study) 39 (35) 38 (36) P = 1.000
Male / female 17/22 17/21 P = 1.000
Castrated / sterilized / intact 7/15/17 10/10/18 P = 0.427
Body condition score (median, total range 1–5) 3 (2–5) 3 (2–4) P = 0.852
Mean bodyweight ± SD, kg 33.5 ± 12.0 34.2 ± 8.6 P = 0.755
Mean age ± SD, years 5.6 ± 2.9 6.5 ± 3.0 P = 0.227
Food eaten at study end (beef / chicken / other) 33/5/1 31/7 P = 0.961
Hip OA (only hip OA) 34 (17) 36 (14) P = 0.431
Stifle OA (only stifle OA) 5 (1) 5 (0) P = 1.000
Elbow OA (only elbow OA) 13 (1) 13 (1) P = 1.000
Any OA + spondylosis or vertebra-OA 8 13 P = 0.208
Duration of symptoms (median) over 2 years 1-2 years P = 0.312
Mean HCPI score at inclusion (W−2) ± SD 16.6 ± 5.8 17.4 ± 5.8 P = 0.464
Number of High (>17) / Low (0–17) HCPI in group 18/21 18/20 P = 1.000
Peak vertical force at baseline ± SD 76.7 ± 19.6 77.2 ± 20.5 P = 0.918
Impulse at baseline ± SD 9.9 ± 3.5 10.0 ± 2.9 P = 0.909
Mean Lameness VAS at baseline ± SD 3.8 ±1.9 4.5 ± 1.9 P = 0.138
Mean Quality of life VAS at baseline ± SD 3.6 ± 1.8 3.8 ± 1.8 P = 0.712
Mean Veterinary index at baseline ± SD 2.4 ± 2.4 2.5 ± 2.2 P = 0.881
Median NSAID use, first questionnaire (W−8) 0-2 x/month 0-2 x/month P = 0.317

P values are for comparison between groups: In 2 x 2 tables the exact Fisher’s tests were used, in nominal to ordinal/scale Linear-by-linear association Chi-Square test were used.

Hielm-Björkman et al.

Hielm-Björkman et al. BMC Veterinary Research 2012 8:157   doi:10.1186/1746-6148-8-157

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