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Table 3 Relative risk ratios and 95% confidence intervals for predictors of trajectory class membership, Birth-to-Twenty+

From: Longitudinal patterns of physical activity, sedentary behavior and sleep in urban South African adolescents, Birth-To-Twenty Plus cohort

Males

Females

 

RRR (95% CI)

 

RRR (95% CI)

Informal Physical Activity

 Class 1--- decreasing (ref)

 Class 1--- decreasing (ref)

 Class 2--- increasing

 Class 2--- decreasing then increase at 16 y

  SES (asset quintile)

1.48 (1.11–1.98)

  SES (asset quintile)

0.95 (0.71–1.29)

  mother’s schooling

0.59 (0.26–1.34)

  mother’s schooling

1.04 (0.45–2.43)

  mother’s marriage/union status

0.48 (0.23–1.01)

  mother’s marriage/union status

0.71 (0.32–1.58)

  parity

0.59 (0.28–1.24)

  parity

0.70 (0.32–1.52)

  Pseudo R2

0.04

  Pseudo R2

0.006

Organized Sports

 Class 1--- consistently low (ref)

 Class 1--- no participation (ref)

 Class 2--- increasing

 Class 2--- some participation

  SES (asset quintile)

0.86 (0.68–1.10)

  SES (asset quintile)

1.04 (0.84–1.30)

  mother’s schooling

1.53 (0.81–2.87)

  mother’s schooling

0.93 (0.51–1.71)

  mother’s marriage/union status

1.15 (0.63–2.10)

  mother’s marriage/union status

0.76 (0.42–1.36)

  parity

1.25 (0.69–2.29)

  parity

1.07 (0.62–1.86)

 Class 3--- decreasing

  SES (asset quintile)

1.00 (0.75–1.33)

  

  mother’s schooling

1.01 (0.48–2.14)

  

  mother’s marriage/union status

0.87 (0.43–1.75)

  

  parity

1.31 (0.66–2.61)

  

 Pseudo R2

0.007

 Pseudo R2

0.003

Walking to and from school

 Class 1--- lower (ref)

 Class 1--- lower (ref)

 Class 2--- higher

 Class 2--- higher

  SES (asset quintile)

0.81 (0.66–0.98)

  SES (asset quintile)

0.68 (0.58–0.81)

  mother’s schooling

0.55 (0.31–0.99)

  mother’s schooling

0.47 (0.28–0.80)

  mother’s marriage/union status

0.70 (0.43–1.14)

  mother’s marriage/union status

1.12 (0.73–1.72)

  parity

0.69 (0.42–1.14)

  parity

0.84 (0.55–1.29)

 Pseudo R2

0.04

 Pseudo R2

0.07

Sedentary Behavior

 Class 1--- stable lower (ref)

 Class 1--- increasing (ref)

 Class 2--- increasing’

 Class 2--- stable higher

  SES (asset quintile)

1.08 (0.86–1.36)

  SES (asset quintile)

1.29 (0.99–1.67)

  mother’s schooling

1.64 (0.91–2.96)

  mother’s schooling

1.50 (0.76–2.94)

  mother’s marriage/union status

1.46 (0.83–2.56)

  mother’s marriage/union status

1.18 (0.62–2.25)

  parity

1.11 (0.63–1.98)

  parity

0.78 (0.40–1.51)

 Class 3--- stable higher

  SES (asset quintile)

1.06 (0.85–1.34)

  

  mother’s schooling

1.82 (1.02–3.25)

  

  mother’s marriage/union status

1.52 (0.87–2.65)

  

  parity

1.14 (0.76–2.35)

  

 Pseudo R2

0.02

 Pseudo R2

0.03

School-night Sleep

 Class 1--- 9 h/night (ref)

 Class 1---8 h/night (ref)

 Class 2--- 8 h/night

 Class 2---9 h/night

  SES (asset quintile)

1.10 (0.93–1.29)

  SES (asset quintile)

0.82 (0.70–0.95)

  mother’s schooling

2.43 (1.58–3.74)

  mother’s schooling

0.46 (0.30–0.72)

  mother’s marriage/union status

1.35 (0.90–2.02)

  mother’s marriage/union status

0.80 (0.54–1.18)

  parity

0.70 (0.46–1.07)

  parity

0.90 (0.62–1.32)

 Class 3--- 10 h/night

 Class 3--- 6.5 h/night

  SES (asset quintile)

0.79 (0.59–1.04)

  SES (asset quintile)

1.11 (0.84–1.45)

  mother’s schooling

0.55 (0.20–1.50)

  mother’s schooling

1.18 (0.59–2.32)

  mother’s marriage/union status

0.76 (0.38–1.53)

  mother’s marriage/union status

1.10 (0.54–2.13)

  parity

0.49 (0.23–1.02)

  parity

1.81 (0.93–3.52)

 Class 4--- 7 h/night

  SES (asset quintile)

1.40 (0.95–2.06)

  

  mother’s schooling

3.63 (1.47–8.98)

  

  mother’s marriage/union status

1.32 (0.55–3.17)

  

  parity

1.19 (0.49–2.90)

  

 Pseudo R2

0.05

 Pseudo R2

0.04

Weekend Sleep

 Class 1--- 9.5 h/night (ref)

 Class 1--- 9 h/ night (ref)

 Class 2--- 11 h/night

 Class 2---10 h/night

  SES (asset quintile)

1.02 (0.83–1.24)

  SES (asset quintile)

1.01 (0.87–1.17)

  mother’s schooling

0.56 (0.32–1.05)

  mother’s schooling

1.07 (0.71–1.62)

  mother’s marriage/union status

0.82 (0.50–1.25)

  mother’s marriage/union status

1.14 (0.78–1.68)

  parity

0.65 (0.39–1.09)

  parity

1.06 (0.73–1.54)

 Class 3--- 7.5 h/night

 Class 3--- 8 h/night

  SES (asset quintile)

1.30 (0.95–1.79)

  SES (asset quintile)

1.10 (0.86–1.43)

  mother’s schooling

0.97 (0.43–2.16)

  mother’s schooling

1.38 (0.67–2.78)

  mother’s marriage/union status

1.00 (0.47–2.13)

  mother’s marriage/union status

1.16 (0.60–2.26)

  parity

0.92 (0.43–1.97)

  parity

0.90 (0.46–1.74)

  

 Class 4--- 11 h/night

  

  SES (asset quintile)

1.04 (0.76–1.43)

  

  mother’s schooling

1.53 (0.64–3.65)

  

  mother’s marriage/union status

0.87 (0.38–1.97)

  

  parity

0.42 (0.17–1.02)

 Pseudo R2

0.02

 Pseudo R2

0.006