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Table 2 Multiple comparisons of EQ-VAS (Tamhane’s T2 method) for pregnant women in different types of tobacco exposure

From: Maternal tobacco exposure and health-related quality of life during pregnancy: a national-based study of pregnant women in China

Types of tobacco exposure

EQ-VAS

Comparison group

Mean EQ-VAS score (SD)

Mean difference

Standard error

p value

95% confidence interval

Upper bound

Lower bound

Non-exposure

85.4 (14.0)

FHS

77.4 (22.2)

0.81

2.39

0.007*

14.44

1.59

SHS

80.6 (17.6)

4.88

0.40

 < 0.001*

5.92

3.83

THS

84.5 (14.9)

0.95

0.26

0.001*

1.62

0.28

FHS

77.4 (22.2)

Non-exposure

85.4 (14.0)

 − 0.81

2.39

0.007*

 − 1.59

 − 14.44

SHS

80.6 (17.6)

 − 3.14

2.41

0.729

3.34

 − 9.61

THS

84.5 (14.9)

 − 7.06

2.39

0.024*

 − 0.63

 − 13.49

SHS

80.6 (17.6)

Non-exposure

85.4 (14.0)

 − 4.88

0.40

 < 0.001*

 − 3.83

 − 5.92

FHS

77.4 (22.2)

3.14

2.41

0.729

9.61

 − 3.34

THS

84.5 (14.9)

 − 3.92

0.41

 < 0.001*

 − 2.84

 − 5.01

THS

84.5 (14.9)

Non-exposure

85.4 (14.0)

 − 0.95

0.26

0.001*

 − 0.28

 − 1.62

FHS

77.4 (22.2)

7.06

2.39

0.024*

13.49

0.63

SHS

80.6 (17.6)

3.92

0.41

 < 0.001*

5.01

2.84

  1. *P value < 0.05 indicates the statistical difference