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Table 3 Univariate and multivariate models of follow-up and blood pressure (BP) control

From: The management of severe hypertension in Australian general practice

  

Modelling lack of follow-up visit (106 clinics; 6,993 patients)*

Modelling hypertension (82 clinics; 5,057 patients)**

Modelling unsustained normotension (75 clinics; 4,431 patients)***

  

Univariate analyses

Multivariate hierarchical regression

Univariate analyses

Multivariate hierarchical regression

Univariate analyses

Multivariate hierarchical regression

Effect

Statistic†

(p-value)

Point estimate

(p-value)

Statistic†

(p-value)

Point estimate

(p-value)

Statistic†

(p-value)

Point estimate

(p-value)

Patient

             

Sex (ref=female)

male

χ2= 7.21

(0.03)

0.11

(0.3)

χ2= 33.37

(<0.0001)

0.33

(<0.0001)

χ2= 0.78

(0.68)

N/A

 

Age

 

-0.03

(<0.0001)

-0.03

(<0.0001)

-0.008

(<0.0001)

-0.007

(0.0007)

0.01

(0.003)

0.01

(0.02)

Previous visits

 

-0.27

(<0.0001)

collinear with prev. SHT

-0.07

(<0.0001)

collinear with prev. SHT

-0.03

(0.01)

collinear with prev. SHT

Previous SHT

 

-0.66

(<0.0001)

-0.45

(0.0008)

-0.09

(<0.0009)

0.17

(<0.0001)

-0.21

(0.02)

0.16

(0.07)

Total CHOL/HDL (ref=unknown)

>4.5

χ2= 69.70

(<0.0001)

-1.23

(<0.0001)

χ2= 30.16

(<0.0001)

-0.05

(0.64)

χ2= 0.20

(0.9)

N/A

 

≤4.5

  

-1.05

(<0.0001)

  

-0.32

(<0.0001)

  

N/A

 

Diabetic Status (ref=no)

yes

χ2= 23.17

(<0.0001)

-1.06

(0.0003)

χ2= 0.98

(0.32)

N/A

 

χ2= 0.05

(0.83)

N/A

 

New or change in medication (ref=no change)

AT1 receptor blocker

    

χ2=70.01

(<0.0001)

-0.64

(<0.0001)

χ2= 17.93

(0.02)

-0.59

(0.01)

ACE inhibitor

      

-0.39

(0.003)

  

-0.24 (all others)

(0.25)

Ca channel blocker

      

0.03

(0.88)

Beta blocker

      

-0.34

(0.14)

Diuretics

      

-0.48

(0.08)

Other single

      

0.07

(0.85)

Combination of 2 drugs

      

-0.48

(<0.0001)

Combination of 3 drugs

      

-0.68

(<0.0001)

GP

             

Sex (ref=male)

female

χ2= 1.23

(0.27)

N/A

 

χ2=1.84

(0.17)

N/A

 

χ2= 0.36

(0.55)

N/A

 

Age

 

-0.01

(0.08)

collinear with years grad.

-0.02

(0.6)

collinear with years grad.

-0.001

(0.85)

collinear with years grad.

Years graduation

 

-0.01

(0.05)

0.002

(0.75)

-0.06

(0.07)

0.004

(0.33)

0.004

(0.55)

N/A

 

Place graduation (ref=Australia)

overseas

χ2= 0.89

(0.35)

N/A

 

χ2=5.89

(0.01)

-0.06

(0.54)

χ2=1.47

(0.23)

N/A

 

Clinic

             

Size

 

-0.01

(0.45)

N/A

 

-0.02

(0.32)

N/A

 

-0.02

(0.25)

N/A

 

Location (ref=Metropolitan)

rural

χ2= 0.14

(0.71)

N/A

 

χ2= 6.20

(0.01)

0.04

(0.72)

χ2= 0.05

(0.82)

N/A

 
  1. *Only clinics with 20 or more patients were included in the analyses.
  2. **Only clinics with 20 or more patients and patients with at least 1 BP measure were included in the analyses.
  3. †Chi square test for categorical variables and logistic regression estimate for continuous variables.
  4. Definitions: SHT=Severe hypertension; CHOL/HDL=Total cholesterol to high-density lipids ratio; AT1=Angiotensin 1; ACE=Angiotensin convertingenzyme; Ca=Calcium.