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Table 5 Percentage in each group with IM, by marital status, and numbers on which percentages are based (n/N)

From: Maternal and perinatal factors associated with hospitalised infectious mononucleosis in children, adolescents and young adults: record linkage study

Group Percentage with IM number with IM/N in subgroup
  Married Not married Married Not married
First born 0.09 0.02 84/886831 3/153241
Younger siblings 0.10 0.04 135/1353932 3/85662
Social class* 1,2 0.08 0.00 53/663583 0/18213
Social class* 3 0.11 0.02 89/824954 1/42864
Social class* 4,5 0.13 0.04 43/329175 1/25585
  1. * Data only available for part of the study period
  2. Chi square values (with Yates' correction), comparing hospitalised IM in offspring of mothers who were married or not married, 17.95, p = .005; 22.88, p = .09; 30.61, p = 0.44; 42.05, p = 0.15; 50.95, p = 0.33.