Using linked administrative data to aid the handling of non-response and restore sample representativeness in cohort studies: the 1958 national child development study and hospital episode statistics data

Table 1 Estimated odds ratios and 95% confidence intervals for identified Hospital Episode Statistics (HES) predictors of non-response at sweep 9 (age 55) in the 1958 British National Child Development Study (n = 6517)

HES variable^a	Odds ratio	95% confidence interval
Number of A&E attendances (per unit increase)	1.03	1.01, 1.05
Proportion of OP appointments missed (per unit increase)	1.03	1.02, 1.03
Treatment by Adult Mental Illness	1.73	1.17, 2.51
ICD Chapter IV: Endocrine, nutritional and metabolic diseases	1.17	0.91, 1.51
ICD Chapter V: Mental and behavioural disorders	1.13	0.83, 1.53
ICD Chapter VI: Diseases of the nervous system	1.14	0.85, 1.51
ICD Chapter X: Diseases of the respiratory system	1.20	0.93, 1.53
ICD Chapter XVIII: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified	1.20	0.98, 1.45
Operation code H: Lower digestive tract	0.73	0.56, 0.93
Operation code T: Soft tissue	1.21	0.95, 1.53

Hosmer-Lemeshow goodness-of-fit test p-value = 0.48
Included variables are those identified from application of the least absolute shrinkage and selection operator (LASSO). Results presented here are from a re-estimated multivariable logistic regression model
^a Unless otherwise noted, the reference category is having not been diagnosed or treated for the relevant condition
A&E: accident and emergency; OP: outpatients

ISSN: 1471-2288