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Table 6 Results of negative binomial regressions for the severity of impacts on the studied pregnant women

From: Impact of periodontal conditions on the quality of life of pregnant women: a cross-sectional study

Variables

Model 1a

Model 2b

Model 3c

 

IRR

95 % CI

P value

IRR

95 % CI

P value

IRR

95 % CI

P value

Model 1

         

VPI

  

0.149

  

0.154

  

0.302

 <50 % site with plaque vs. 50 % + site with plaque

/

/

 

/

/

 

/

/

 

BOP

  

0.252

  

0.290

  

0.406

 <25 % site with bleeding vs. 25 % + site with bleeding

/

/

 

/

/

 

/

/

 

PPD

  

0.924

  

0.755

  

0.864

 <25 % site with PD > =4 vs. 25 % + site with PD > =4

/

/

 

/

/

 

/

/

 

CAL

  

0.062

  

0.025

  

0.138

 0 % site with CAL > =4 vs. 0 % + site with CAL > =4

/

/

 

1.29

1.03-1.61

 

/

/

 

Model 2

         

Trimesters

     

0.333

  

0.473

 First vs. Second

   

/

/

 

/

/

 

 vs. Third

   

/

/

 

/

/

 

Previous births

     

0.917

  

0.977

 None vs. One or more

   

/

/

 

/

/

 

Utilization of dental services

     

0.366

  

0.605

 No vs. Yes

   

/

/

 

/

/

 

Frequency of nausea-vomiting

     

0.011

  

0.012

 Once or less vs. Twice

   

1.28

1.03-1.58

 

1.24

1.00-1.55

 

 vs. Three times or more

   

1.4

1.09-1.79

 

1.42

1.10-1.82

 

Self-repored systematic disease

     

0.186

  

0.250

 No vs. Yes

   

/

/

 

/

/

 

Model 3

         

Age (Years)

        

0.431

 25 or below vs. 26-30

      

/

/

 

 vs. 31-35

      

/

/

 

 vs. 36 or above

      

/

/

 

Location

        

0.861

 Urban vs. Rural

      

/

/

 

Marital status

        

0.616

 Married vs. Single

      

/

/

 

Birth place

        

0.199

 Shanghai vs. Other places

      

/

/

 

Education level

        

0.186

 Higher secondary school or below vs. Matriculation or bachelor degree or above

      

/

/

 

Monthly household income

        

0.872

 Less than RMB 6000 vs. RMB6000 or more

      

/

/

 

Coverage of dental insurance

        

0.058

 No vs. Yes

      

/

/

 

Tooth loss

        

0.119

 0 teeth missing vs. 1+ teeth missing

      

/

/

 
  1. aLikelihood Ratio χ2 = 5.8, df = 4, p =0.211; Deviance ratios = 1.07
  2. bLikelihood Ratio χ2 = 19.1, df = 11, p =0.059; Deviance ratios = 1.06
  3. cLikelihood Ratio χ2 = 30.8, df = 22, p =0.100; Deviance ratios = 1.06
  4. Model 1: Negative binomial regression for periodontal condition variables
  5. Model 2: Negative binomial regression for periodontal condition variables after adjustment for pregnancy-related variables
  6. Model 3: Negative binomial regression for periodontal condition variables after adjustment for pregnancy-related variables and possible confounders
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Health and Quality of Life Outcomes

ISSN: 1477-7525

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