Table 3 Multivariable Firth's logistic regression model of predictors of CKD coding on discharge in patients with uncoded CKD (discharge eGFR and uACR)

Age

Age

1.04

1.02

0.07

1.00 to 1.09

1.04

1.02

0.08

1.00 to 1.08

Sex

Male

0.75

1.63

0.60

0.25 to 2.18

-

-

-

-

Ethnicity

Non-White

0.60

2.19

0.54

0.09 to 2.90

-

-

-

-

Socioeconomic deprivation

IMD

1.09

1.12

0.50

0.85 to 1.40

-

-

-

-

Diagnoses

Diabetes

1.64

1.71

0.40

0.51 to 5.32

-

-

-

-

Hypertension

2.77

1.67

0.06

0.95 to 9.09

3.14

1.70

0.03

1.14 to 9.97

Dementia

1.08

2.41

0.94

0.11 to 5.60

-

-

-

-

MH diagnosis

1.19

1.94

0.82

0.22 to 4.35

-

-

-

-

Cancer diagnosis

1.28

1.79

0.70

0.34 to 4.16

-

-

-

-

AKI during admission

1.89

1.61

0.23

0.65 to 5.16

-

-

-

-

HF during admission

0.66

1.86

0.52

0.15 to 2.24

-

-

-

-

Urine ACR

ACR > 30 mg/mmol

3.44

2.53

0.22

0.47 to 28.88

-

-

-

-

ACR 3–30 mg/mmol

1.22

2.14

0.81

0.26 to 7.75

-

-

-

-

CKD Stage

Advanced CKD

(stages 4 and 5 combined)

3.67

1.72

0.03

1.14 to 11.51

4.90

1.71

0.006

1.60 to 14.20

Table Key

Reference categories

Sex: Female; Ethnicity: White; Diagnoses: absence of diagnosis; ACR: ACR < 3mg/mmol; CKD stage: stages 1, 2 and 3 combined. SE = standard error

Statistically significant

values in bold.