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Table 3 Tobit regression models for association between BMI category and HRQOL and its gender difference

From: Gender differences in the association between body mass index and health-related quality of life among adults:a cross-sectional study in Shandong, China

Variable

Model I Men

Model II Women

Model III

Interaction: Gender × BMI

Coefficient

95%CI

Coefficient

95%CI

Coefficient

95%CI

Age

−.011***

(−.012, −.010)

−.012***

(−.013, −.011)

−.011***

(−.012, −.011)

Urban (vs rural)

.055***

(.026, .083)

.045***

(.023, .071)

.048***

(.030, .066)

Education attainment (vs Primary school or below)

 Junior school

.102***

(.074, .130)

.055***

(.031, .079)

.077***

(.059, .095)

 Senior school or above

.115***

(.081, .150)

.071***

(.039, .104)

.091***

(.068, .114)

Smokers

.026*

(.002, .049)

.014

(−.044, .073)

.025*

(.004, .045)

Drinkers

.096***

(.072, .119)

−.026

(−.072, .020)

.072***

(.052, .092)

Exercise times weekly (vs ≥ 6)

 1–5

−.092***

(−.136, −.048)

−.098***

(−.133, −.062)

−.095***

(−.123, −.068)

 <1

−.140***

(−.177, −.103)

−.147***

(−.177, −.117)

−.143***

(−.166, −.120)

Health examination

−.063***

(−.087, −.039)

−.064***

(−.082, −.046)

−.064***

(−.079, −.049)

Number of chronic diseases (vs 0)

 1

−.186***

(−.213, −.159)

−.177***

(−.199, −.156)

−.181***

(−.198, −.164)

 2

−.299***

(−.336, −.262)

−.271***

(−.299, −.243)

−.283***

(−.306, −.261)

 ≥ 3

−.385***

(−.442, −.327)

−.347***

(−.392, −.303)

−.365***

(−.400, −.329)

Family members with cancers

−.175***

(−.261, −.089)

−.208***

(−.283, −.132)

−.193***

(−.249, −.136)

BMI categories (vs Normal weight)

 Underweight

−.148***

(−.200, −.095)

−.099***

(−.137, −.061)

−.106***

(−.147, −.066)

 Overweight

.023

(−.002, .049)

−.002

(−.021, .018)

−.004

(−.024, .017)

 Obese

.032

(−.026, .090)

−.068**

(−.107, −.028)

−.074**

(−.116, −.032)

Men (vs Women)

    

−.047***

(−.069, −.025)

Gender × BMI

 Men × underweight

    

−.034

(−.097, .028)

 Men × overweight

    

.026

(−.006, .057)

 Men × obese

    

.103**

(.035, .171)

Constant

2.083***

(1.998, 2.168)

2.163***

(2.097, 2.229)

2.156***

(2.103, 2.208)

Respondents

13032

 

14225

 

27257

 

R 2

.237

 

.285

 

.262

 
  1. CI confidence interval,* P<0.05, **P<0.01, ***P<0.001, Gender×BMI = interaction effect between gender and BMI category