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Table 1 Unadjusted distribution of each variable by NS-SEC category, for the two analysis samples (IID2 study 2008–9)

From: Socioeconomic status is associated with symptom severity and sickness absence in people with infectious intestinal disease in the UK

  Cases ≥5 years of age (n = 1915) Cases school/working age (n = 1270)
  Percentage within each category of NS-SEC    Percentage within each category of NS-SEC   
  Managerial/ professional Intermediate Routine/manual p-valuea All casesb Managerial/professional Intermediate Routine/ manual p-valuea All casesb
  (n = 949) (n = 330) (n = 337)   (n = 1915) (n = 662) (n = 215) (n = 228)   (n = 1270)
Age group (years)
 5–14 12.2 9.4 9.5 0.342 10.6 17.5 14.4 14 0.337 16
 15–24 4.4 5.2 7.4   5.2 6.3 7.9 11   7.9
 25–44 24.1 22.7 23.7   22.9 34.6 34.9 35.1   34.5
 45–64 36 36.7 33.5   35.1 41.5 42.8 39.9   41.7
 65+ 23.2 26.1 25.8   26.2      
Male 38 32.7 45.1 0.004 37.9 39.7 37.2 49.6 0.014 41
Ethnicity Non-White 3.4 4.8 3.6 0.468 4 3.9 7 4.8 0.185 5.1
Rural residence 30.6 30 19 <0.001 28.8 30.3 28.4 20.6 0.019 27.6
Travelled before illness 14.3 10.3 7.7 0.004 11.9 15.6 13.1 7.9 0.013 12.9
Symptom severity
 Mild 38.3 34.4 20.3 <0.001 24.5 40 36 20.7 <0.001 26.8
 Moderate 34 33 35.5   24.9 36.7 32 38   27.1
 Severe 27.7 32.6 44.2   23.4 23.3 32 41.3   22.1
Absent work/school 55.1 54.2 63 0.028 53.4 61.4 62.7 71.6 0.023 61
  1. IID infectious intestinal disease, NS-SEC National Statistics Socioeconomic Classification, SD standard deviation
  2. Figures expressed as percentages except where stated otherwise
  3. aStatistical significance of relationship between NS-SEC and each variable, tested using χ2 test
  4. bTotal number of cases includes those with missing NS-SEC
  5. Missing data (%) for cases ≥5 years and cases school/working age, respectively: NS-SEC 16 and 13; Urban/rural 0.1 and 0.2; Foreign travel 0.6 and 0.3; Symptom severity 27 and 24; Absence 3.6 and 2.7