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Table 3 Descriptive statistics of external and internal temperatures within the different months. Means with different superscript letters in a column are significantly different (p < 0.05)

From: On-farm storage of livestock vaccines may be a risk to vaccine efficacy: a study of the performance of on-farm refrigerators to maintain the correct storage temperature

  External temperature Internal temperature
Month n Mean SD SEM Mean SD SEM
Jan 13,447 11.8a 5.1 0.044 4.1ª 2.8 0.024
Feb 24,192 11.9a 5.0 0.032 4.0a 2.8 0.018
Mar 26,784 13.4b 4.8 0.030 4.2b 2.9 0.018
Apr 25,920 15.2c 4.0 0.025 4.6c 3.0 0.018
May 26,784 17.0d 3.8 0.023 5.0d 3.2 0.012
Jun 25,920 20.3e 3.4 0.021 5.7e 4.0 0.025
Jul 26,784 21.8f 3.2 0.019 6.2f 4.7 0.028
Aug 26,265 19.1g 3.1 0.019 5.9g 3.9 0.024
p value   < 0.05    < 0.05   
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