sylvana côté, ph.d.christophe.genolini.free.fr/recherche...2 applications of group-based...
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Epidemiologic Applications: Group-Based Developmental
Trajectories
Sylvana Côté, Ph.D.
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Applications of groupApplications of group--basedbasedtrajtrajectoryectory methodmethod
A. Topography of social development A. Topography of social development B. ID predictors of trajectoriesB. ID predictors of trajectoriesC. ID outcomes of trajectoriesC. ID outcomes of trajectoriesD. Model coD. Model co--morbidity (comorbidity (co--occurrence)occurrence)
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A developmental trajectory describes the course of a A developmental trajectory describes the course of a behaviour or characteristic as a function of age or time.behaviour or characteristic as a function of age or time.
Definition: Trajectory
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Definition: Heterogeneity
Object or system consisting of multiple items havinga large number of structural variations.
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When to use groupWhen to use group--based based trajectories?trajectories?
Hypotheses about developmental Hypotheses about developmental trajectories that are inherently trajectories that are inherently categorical: categorical:
Do certain types of people tend to have Do certain types of people tend to have distinctive developmental trajectories?distinctive developmental trajectories?
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MethodsParticipants:
• 3000 kindergarten children.• Representatives of Quebec
children in 1986• Repeated assessments of a
behavior
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Hyperactivity TrajectoriesBoys
Girls
16.9%
10.9%35.8%
Impulsive36.5%
0
0,5
1
1,5
2
2,5
6 7 8 9 10 11 12
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Data before proc Data before proc trajtraj: 7 assessments per : 7 assessments per individual over 7 yearsindividual over 7 years
5
4
5
3
4
4.55
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Outputs of the analysisOutputs of the analysis
ProbabilityProbability of of belongingbelonging to a to a trajectorytrajectorygroupgroup
Varies Varies fromfrom 0 to 10 to 1TrajectoryTrajectory group assignement group assignement basedbased on on maximum maximum posteriorposterior probabilityprobability
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Trajectoires d’hyperactivité
0
0,5
1
1,5
2
2,5
3
6 7 8 9 10 11 12
Côté et al. (2002). Journal of Child Psychology and Psychiatry
Garçons
Nicholas: P=0.7
Nicholas: P=0.2
Nicholas: P=0.1
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1111
Trajectoires d’hyperactivité
0
0,5
1
1,5
2
2,5
3
6 7 8 9 10 11 12
Côté et al. (2002). Journal of Child Psychology and Psychiatry
Garçons
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Groups with distinct and opposite Groups with distinct and opposite developmentdevelopment
1
2
Time 1 Time 2 Tme 3 Time 4
Leve
l of
depr
essi
on
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Body Mass Index TrajectoriesBody Mass Index Trajectories
141516171819202122232425
0,5 1,5 2,5 3,5 4,5 5 6 7 8Age (years)
BMI
41%
5.4%
54.5%
Pryor, Touchette, Genolini, Falissard, Tremblay, Côté.
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Body Mass Index TrajectoriesBody Mass Index Trajectories
141516171819202122232425
0,5 1,5 2,5 3,5 4,5 5 6 7 8Age (years)
BMI Overweight
Obese
Pryor, Touchette, Genolini, Falissard, Tremblay, Côté.
Maternal Risk:Smoking pregnancy
Obesity
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DEVELOPPEMENT DE LDEVELOPPEMENT DE L’’AGGRESSION AGGRESSION PHYSIQUE: 1.5 TO 17 YEARSPHYSIQUE: 1.5 TO 17 YEARS
N=2 223ELDEQ
N=10 658ELNEJ
Côté et al. (2006). Journal Abnormal Child Psychology
0
2
4
6
8
10
12
11 12 14 15 16 17
0
0,5
1
1,5
2
2,5
3
2 3 4 5 6 7 8 9 10 11
Phys
ical
agg
ress
ion
scor
e
0
0,5
1
1,5
2
2,5
3
1.5 2.5 3.5 4.5 6.0
N=1 000DEGEP
NIVEAU ATYPIQUE OBSERVABLE TÔT
D’AGRESSION PHYSIQUE ÉLEVÉE =
RAREDE NOVO =RARE
NORME= INHIBITION DE L’AGRESSION
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A. TOPOGRAPHYA. TOPOGRAPHYPhysical aggression between: 1.5 and 6 yearsPhysical aggression between: 1.5 and 6 years
N=2000
Côté et al. (2006). Journal Abnormal Child Psychology
0
0,5
1
1,5
2
2,5
3
1.5 2.5 3.5 4.5 6.0
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B. ID predictors of trajectoriesB. ID predictors of trajectories
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Sous quelles conditions les enfants peuvent-ils
bénéficier de la fréquentation de la
crèche?
Milieu familiale?
Qualité de la garderie?
Conditions de la fréquentation?
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Côté S.M. et al (2007). Archives of General Psychiatry.
ELDEQ: N=1691
00,05
0,10,15
0,20,25
0,30,35
0,40,45
Before 9 months at or after 9 months NeverAge which child care was intiated
High maternal educationLow maternal education OR=2.77
Protection by Child Care for HighProtection by Child Care for High--Risk Risk Children: Physical Aggression (N=1691)Children: Physical Aggression (N=1691)
Côté et al., 2007, Archives of general Psychiatry
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Côté S.M. et al (2007). Archives of General Psychiatry.
ELDEQ: N=1691
00,05
0,10,15
0,20,25
0,30,35
0,40,45
Before 9 months at or after 9 months NeverAge which child care was intiated
High maternal educationLow maternal education OR=5
Protection by Child Care for HighProtection by Child Care for High--Risk Risk Children: Physical Aggression (N=1691)Children: Physical Aggression (N=1691)
Côté et al., 2007, Archives of general Psychiatry
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C. Applications:C. Applications:LinkingLinking trajectoriestrajectories to to
outcomesoutcomes
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Child Care services Child Care services betweenbetween5 5 monthsmonths and 4 and 4 ½½ yearsyears
0
5
10
15
20
25
30
35
40
45
5 17 29 41 50
Child's Age in Months
Num
ber
of h
ours
/wk
in C
hild
-Car
e
High-Amount CCG (34.5%)Moderate-Amount CCG (28,4)
Low-Amount CCG (37,1)
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ChildChild--care services reduce socioeconomic care services reduce socioeconomic inequalities in school readinessinequalities in school readiness
d=0.56
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ChildChild--care services reduce socioeconomic care services reduce socioeconomic inequalities in academic achievementinequalities in academic achievement
d=0.46
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2525
ChildrenChildren whowho benefitbenefit the the mostmost are are lessless likelylikely to to receivereceive childchild carecare
0
5
10
15
20
25
30
35
40
45
5 17 29 41 50
Child's Age in Months
Num
ber
of h
ours
/wk
in C
hild
-Car
e
High-Amount CCG (34.5%)Moderate-Amount CCG (28,4)
Low-Amount CCG (37,1)
Low maternal educationFamily dysfunctionLow family income
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Testing the impact of an Testing the impact of an experimental interventionexperimental intervention
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2828Lacourse, E., Côté, S., Nagin, D. S., Vitaro, F., Brengden M., & Tremblay, R. E. (2002). A longitudinal-experimental design to test developmental theories of antisocial behavior. Development and Psychopathology, 14, 911-926.
26.3%
TrajectoriesTrajectories of of physicalphysical violence violence
14.2%
5.8%
6.9%
16.4%
24.4%32.2%
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KINDERGARTEN INTERVENTION KINDERGARTEN INTERVENTION MODIFIED TRAJECTORIES OF VIOLENCEMODIFIED TRAJECTORIES OF VIOLENCE
Lacourse, E., Côté, S et al. (2002). Development and Psychopathology.
Physical Aggression
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
Low 1 Low 2 Lowrising
Lowdecline
Mediumdecline
Highrising
Prob
abili
ties
Control group
Intervention group
Low risk group
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D. Applications:D. Applications:ModModééliserliser la la ‘‘coco--morbiditmorbiditéé’’, la , la
continuitcontinuitéé hhééttéérotypiquerotypique versus versus homotypiquehomotypique
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ContinuitContinuitéé hhééttéérotypiquerotypique (vs (vs homotypique)homotypique)
ContinuitContinuitéé dd’’un trait ou attribue qui sousun trait ou attribue qui sous--tend divers comportements. tend divers comportements. PrPréésume continuitsume continuitéé mais avec des mais avec des manifestations diffmanifestations difféérentes selon lrentes selon l’’âge et âge et les contextes de vie. (autobus vs vles contextes de vie. (autobus vs véélo)lo)
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L’agressivité physique:Frapper; donner des
coups; se battre;
L’agressivité indirecte: répandre de fausses
rumeurs; exclure d’autres enfants; dire du
mal dans le dos des autres.
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Age DifferencesAge DifferencesDevelopmental Hypothesis Developmental Hypothesis
((BjorkqvistBjorkqvist et al., 1992et al., 1992))
Early Childhood (preverbal)Early Childhood (preverbal)Middle ChildhoodMiddle Childhood
Later Adolescence & Later Adolescence & AdulthoodAdulthood
PHYSICAL INDIRECT
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PRPRÉÉDICTORS OF JOINT DICTORS OF JOINT TRAJECTORIESTRAJECTORIES
0
0,5
1
1,5
2
2,5
3
4 6 8Age in years
Mea
n in
dire
ct a
ggre
ssio
n sc
ore
Low 67.9%; High rising: 32.01%
0
0,5
1
1,5
2
2,5
3
2 4 6 8
Age in years
Mea
n ph
ysic
al a
ggre
ssio
n sc
ore
Low: 5% Low-Desister: 36.3%Moderate-Desister 43.8% High: 14.5%
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Joint and conditional probabilitiesJoint and conditional probabilitiesTable 3. Joint and Conditional Probabilities of Physical and Indirect Aggression.
Type of Aggression
Physical Aggression
Indirect Aggression
Low Low desisting
Moderate Desisting
High
Probabilities of Joint Trajectory Group
Membership†
Low (1) 0.048 (3) 0.324 (5) 0.297 (7) 0.011
High rising (2) 0.004 (4) 0.039 (6) 0.142 (8) 0.135
Probability of PA Conditional on IA
Low 0.071 0.477 0.436 0.016
High rising 0.011 0.124 0.444 0.420
Probability of IA Conditional on PA
Low 0.932 0.891 0.676 0.075
High rising 0.068 0.109 0.324 0.925 † The numbers in parentheses indicate the trajectory group number
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PRPRÉÉDICTORS OF JOINT DICTORS OF JOINT TRAJECTORIESTRAJECTORIES
0
0,5
1
1,5
2
2,5
3
4 6 8Age in years
Mea
n in
dire
ct a
ggre
ssio
n sc
ore
Low 67.9%; High rising: 32.01%
0
0,5
1
1,5
2
2,5
3
2 4 6 8
Age in years
Mea
n ph
ysic
al a
ggre
ssio
n sc
ore
Low: 5% Low-Desister: 36.3%Moderate-Desister 43.8% High: 14.5%
Young momPoverty
Coercive parGirl
Coercive par
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E. Limits and notes of cautionE. Limits and notes of caution
Toujours corrToujours corréélationnellationnelId du meilleur modId du meilleur modèèleleVoir de lVoir de l’’hhééttéérogrogéénnééititéé llàà ou il nou il n’’y en a pas?y en a pas?Les groupes distincts sont des sont estimationsLes groupes distincts sont des sont estimations