Table 1

Baseline covariate comparison of included and excluded sample at T1

Baseline data from T1Included sample
(n=620)
Excluded sample
(n=1876)
p Value
Mean age (SD) (years)35.9 (5.07)34.7 (5.37)<0.001 *
Mean height † (SD) (cm)177 (6.19)177 (6.79)0.76 *
Mean BMI † (SD) (kg/m2)24.6 (2.84)25.2 (3.31)<0.001*
Housing tenure‡ (%)
 Own property and no mortgage4.683.780.03§ 
 Being bought/mortgaged90.288.2
 Private Rented2.742.51
 Council/Housing Assoc. rented1.293.57
 Other1.131.92
Financial difficulties (%)
 Least difficulty51.044.80.007 § 
 Slight difficulty15.514.3
 Moderate difficulty20.022.4
 Most difficulty13.618.5
Highest educational qualification † (%)
Degree41.628.7<0.001 §
 A Level29.430.0
 O Level18.722.6
 Vocational3.556.93
 CSE6.7711.8
Number of cigarettes a day (%)
 None87.778.5<0.001 §
 1–95.169.28
 10–194.847.30
 20+2.264.90
Alcohol consumption (%)
 Less than once a week26.328.60.030 §
 At least once a week45.043.8
 1–2 glasses near every day24.220.5
 ≥3 glasses nearly every day4.527.14
Relationship quality score (%)
 Least caring29.833.60.015 §
 Moderately caring32.134.6
 Most caring38.131.8
  • * t-test.

  • †Data from 3 years prior to T1 as approximation to T1.

  • ‡Data from 3 years after to T1 as approximation to T1.

  • § Χ2 test.