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Table 1 Characteristics of cohort at stratified by eligibility for analysis

From: Predicting who fails to meet the physical activity guideline in pregnancy: a prospective study of objectively recorded physical activity in a population-based multi-ethnic cohort

 

Valid SWA data (eligible)

Without valid SWA data (not eligible)

 

(n = 555)

(n = 268)

 

n

%

n

%

P-value a

Ethnicity

    

<0.01

 South Asian

125

(22.5)

75

(28.0)

 

 Middle Eastern

75

(13.5)

51

(19.0)

 

 Other ethnicity

100

(18.0)

61

(22.8)

 

 Western

255

(46.0)

81

(30.2)

 

Occupation

    

0.20

 Elementary occupations and homemakers

150

(27.4)

86

(33.5)

 

 Clerical/care occupations

196

(35.8)

86

(33.5)

 

 Manager/° occupations

202

(36.8)

85

(33.0)

 

 Missing

7

 

11

  

Education

    

0.39

 <10 years

85

(15.4)

48

(18.2)

 

 10–12 years

216

(39.0)

108

(40.9)

 

 University or college

252

(45.6)

108

(40.9)

 

 Missing

2

 

4

  

Parity

    

0.11

None (nulliparous)

253

(45.6)

128

(47.8)

 

 1 (uniparous)

201

(36.2)

79

(29.5)

 

 ≥2 (multiparous)

101

(18.2)

61

(22.7)

 

Smoking 3 months pre-pregnancy

    

0.96

 Non-smoker

455

(82.4)

218

(82.6)

 

 Irregular or daily smoker

97

(17.6)

46

(17.4)

 

 Missing

3

 

4

  

Self-reported pre-pregnancy PA

    

0.16

 ≥150 min/wk

220

(40.6)

91

(35.4)

 

 <150 min/wk

322

(59.4)

166

(64.6)

 

 Missing

13

 

11

  

Health pre-pregnancy

    

0.78

 Poor/not too good

58

(10.6)

30

(11.5)

 

 Good

279

(50.7)

137

(52.3)

 

 Very good

213

(38.7)

95

(36.2)

 

 Missing

5

 

6

  

Pelvic girdle-/lumbopelvic pain

    

0.87

 Yes

228

(41.8)

107

(41.2)

 

 No

318

(58.2)

153

(58.8)

 

 Missing

9

 

8

  
 

Mean

SD

Mean

SD

P-value b

Age (years)

30.1

(4.9)

29.3

(4.8)

0.02

BMI pre-pregnancy

24.4

(4.8)

25.0

(4.9)

<0.01

Body fat percentage

33.1

(7.4)

34.5

(7.3)

0.15

  1. SD standard deviation, SWA Sensewear Armband, BMI body mass index
  2. a Chi-Square test
  3. b t-test