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Table 2 Baseline characteristics of clusters and parents by arm

From: Randomised cluster trial to support informed parental decision-making for the MMR vaccine

Characteristics Intervention arm Control arm
Primary healthcare centres, n 3 3
Childcare organisations, n 3 3
Mean healthcare centre parent list size 216 210
Mean childcare organisation parent list size 19 30
Mean Low Income Scheme Index scorea 10 11
Parents, n 71 71
Mean age ± SD, yrs 34.07 ± 5.43 34.06 ± 5.52
Ethnicity, n (%)   
White British 68 (95.8%) 68 (95.8%)
Other 3 ( 4.2%) 3 ( 4.2%)
Marital status, n (%)   
Single or living with partner 27 (38.0%) 13 (18.3%)
Married or re-married 40 (56.4%) 57 (80.2%)
Separated/Divorced/Widowed 4 .(5.6%) 1 (1.5%)
Relationship to eligible child, n (%)   
Mother 67 (94.4%) 67 (94.4%)
Father 4 (5.6%) 4 (5.6%)
Education   
Left school at 16 years 24 (33.8%) 25 (35.2%)
Left school at 18 years 10 (14.1%) 10 (14.1%)
Achieved Degree or higher 37 (52.1%) 36 (50.7%)
Have older child   
Yes 36 (50.7%) 36 (50.7%)
No 35 (49.3%) 35 (49.3%)
First (youngest) child eligible, n (%) First dose MMR decision 23 (32.4%) 44 (62.0%)
Second dose MMR decision 48 (67.6%) 27 (38.0%)
Mean age ± SD of first (youngest) child eligible, months 25.73 ± 14.66 19.77 ± 11.69
Second youngest child eligible, n (%)   
First dose MMR decision 1 ( 4%) 0 (0.00%)
Second dose MMR decision 24 (96%) 22 (100.0%)
Mean age ± SD of second youngest child eligible, months 50.56 ± 17.13 49.32 ± 21.41
  1. Note. N = 12 clusters, N = 142 parents. aLow Income Scheme Index score is based on the percentage of prescribed items exempt from a prescription charge due to low income of the patient.