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Table 3 Differences in sample characteristics between individuals with two or three observations

From: Is adolescent body mass index and waist circumference associated with the food environments surrounding schools and homes? A longitudinal analysis

 

Mean values

Tests

2 observations

3 observations

Statistic

p-value

Age during Year 7

11.6

11.6

0.80

0.427

Age during Year 9

13.9

13.9

1.28

0.200

Age during Year 11

15.9

15.9

1.47

0.144

Sex (Male)

0.44

0.54

7.37

0.007

Race (Non-White)

0.24

0.21

0.90

0.343

Home deprivation Score

0.29

0.22

4.07

< 0.001

School deprivation score

0.25

0.18

5.80

< 0.001

  1. NB. T-tests were performed for continuous data (and mean values are presented in the table), chi-squared tests for categorical (proportions are presented in the table)