Table 2

Unadjusted ORs for risk of instability from univariable random intercept logistic regression models of instability in each year

	OR	95% CI	p Value	Model characteristics
Univariable model: age group				Log-likelihood: −27410.1 Degrees of freedom: 7 BIC: 54898.1 Data used: 68 702 observations from 20 436 persons
<1 year	5.84	5.26 to 6.48	<0.01
1–5 years	Ref
6–10 years	0.60	0.54 to 0.67	<0.01
11–15 years	1.14	1.02 to 1.28	0.02
16–20 years	1.40	1.25 to 1.56	<0.01
21–25 years	1.24	1.11 to 1.38	<0.01
Univariable model: gender				Log-likelihood: −28178.7 Degrees of freedom: 3 BIC: 56390.86 Data used: 68 690 observations from 20 432 persons
Male	Ref
Female	1.12	1.03 to 1.21	<0.01
Univariable model: ethnicity				Log-likelihood: −24482.0 Degrees of freedom: 5 BIC: 49018.47 Data used: 54 102 observations from 15 816 persons
White	Ref
South Asian	1.69	1.34 to 2.12	<0.01
Black	2.01	1.31 to 3.07	<0.01
Other	1.57	1.19 to 2.06	<0.01
Univariable model: deprivation category				Log-likelihood: −28097.2 Degrees of freedom: 6 BIC: 56261.25 Data used: 68 566 observations from 20 355 persons
1—most deprived	Ref
2	1.02	0.92 to 1.14	0.65
3	0.92	0.82 to 1.03	0.13
4	0.86	0.76 to 0.96	<0.01
5—least deprived	0.81	0.72 to 0.91	<0.01
Univariable model: primary diagnostic category				Log-likelihood: −27649.8 Degrees of freedom: 12 BIC: 55433.32 Data used: 68 702 observations from 20 436 persons
Neurological	1.68	1.48 to 1.90	<0.01
Haematology	1.86	1.58 to 2.18	<0.01
Oncology	2.27	2.03 to 2.55	<0.01
Metabolic	2.00	1.61 to 2.47	<0.01
Respiratory	3.03	2.65 to 3.45	<0.01
Circulatory	0.64	0.53 to 0.78	<0.01
Gastrointestinal	3.33	2.55 to 4.34	<0.01
Genitourinary	2.72	2.35 to 3.15	<0.01
Perinatal	0.27	0.23 to 0.32	<0.01
Congenital	Ref
Other	1.74	1.08 to 2.82	0.02

Each variable has a separate model.
BIC, Bayesian Information Criterion.