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Table 1 Peak month, Amplitude and Significance of tests for seasonal trends in total and positive Monospot test results by age and gender

From: The epidemiology of infectious mononucleosis in Northern Scotland: a decreasing incidence and winter peak

Positive test results
  Numbers analysed Peak month Amplitude (%) Crude 95% CI* Edwards’ & Roger’s P
All tests  
0-14 1150 March 31.3 31.0-31.5 <0.0001
15-24 6119 February 14.3 14.2-14.3 <0.0001
25-44 1156 March 1.9 1.7-2.1 0.9
>45 222 August 18.3 17.0-19.6 0.3
All ages 8647 February 13.8 13.8-14 <0.0001
Female  
0-14 691 March 32.4 32.0-32.8 <0.0001
15-24 3300 February 16.2 16.1-16.3 <0.0001
25-44 554 February 8.1 7.6-8.6 0.1
>45 101 April 29.1 26.3-31.8 0.3
All ages 4646 February 16.6 16.6-17.0 <0.0001
Male  
0-14 459 March 29.9 29.3-30.5 <0.0001
15-24 2819 February 11.9 11.8-12.0 <0.0001
25-44 602 July 4.4 3.9-4.9 0.6
>45 121 August 20.3 18.1-22.7 0.2
All ages 4001 February 10.5 10.5-10.6 <0.0001
Total tests performed
  Numbers analysed Peak month Amplitude (%) Crude 95% CI* Edwards’ & Roger’s P
All tests  
0-14 9884 February 34.5 34.4-34.5 <0.0001
15-24 30663 February 12.2 12.2-12.2 <0.0001
25-44 17615 April 12.9 12.9-12.9 <0.0001
>45 4066 March 13.0 12.9-13.1 <0.0001
All ages 62228 February 13.8 13.8-13.8 <0.0001
Female  
0-14 5565 February 32.1 32.0-32.2 <0.0001
15-24 18873 February 13.1 13.1-13.1 <0.0001
25-44 10936 March 16.6 16.5-16.6 <0.0001
>45 2449 March 17.0 16.9-17.1 <0.0001
All ages 37823 February 14.4 14.4-14.4 <0.0001
Male  
0-14 4319 February 37.6 37.5-37.7 <0.0001
15-24 11790 February 10.8 10.8-10.9 <0.0001
25-44 6679 April 6.9 6.9-7.0 0.009
>45 1617 March 7.5 7.4-7.7 0.1
All ages 24405 February 12.8 12.8-12.9 <0.0001
  1. *CI: 95% Confidence intervals.