Benefits of extensive recruitment effort persist during follow-ups and are consistent across age group and survey method. The TRAILS study

Esther Nederhof; Frederike Jörg; Dennis Raven; René Veenstra; Frank C Verhulst; Johan Ormel; Albertine J Oldehinkel

doi:10.1186/1471-2288-12-93

Table 8 Multiple multinomial logistic regression analysis predicting T4-easy-to-recruit, T4-hard-to-recruit, T4-non-responder, and drop-out since T2 or T3

From: Benefits of extensive recruitment effort persist during follow-ups and are consistent across age group and survey method. The TRAILS study

	T4-easy-to-recruit (n = 1,359) (ref.)	T4-hard-to-recruit (n = 213)			T4-non-responder (n = 98)			Drop-out since T2 or T3 (n = 150)
	n(%)	n(%)	OR	95% CI	n(%)	OR	95% CI	n(%)	OR	95% CI
T1 Recruitment Effort
Hard to recruit	42 (3.1)	8 (3.8)	0.98	0.44-2.17	13 (13.3)	2.51*	1.21-5.18	18 (12.0)	2.65*	1.42-4.96
(univariate effects)			1.22	0.57-2.64		4.80*	2.48-9.28		4.28*	2.39-7.64
T1 Socio-demographics
Girl	747 (55.0)	66 (31.0)	0.41*	0.30-0.56	40 (40.8)	0.64*	0.41-1.00	72 (48.0)	0.84	0.59-1.20
(univariate effects)			0.37*	0.27-0.50		0.57*	0.37-0.56		0.76	0.54-1.06
Non-western immigrant	87 (6.4)	23 (10.8)	1.66	1.00-2.76	23 (23.5)	3.11*	1.76-5.47	29 (19.3)	2.67*	1.62-4.39
(univariate effects)			1.77*	1.09-2.87		4.48*	2.68-7.51		3.50*	2.21-5.55
Parents divorced	248 (18.2)	33 (26.8)	1.45	0.99-2.12	33 (33.7)	1.47	0.88-2.47	32 (21.3)	0.81	0.51-1.31
(univariate effects)			1.64*	1.17-2.28		2.27*	1.46-3.54		1.22	0.80-1.84
Lower educ.mother (≤lower tracks of sec. educ.)	422 (31.1)	88 (41.3)	1.30	0.94-1.78	60 (61.2)	2.24*	1.42-3.54	88 (58.7)	2.52*	1.75-3.64
(univariate effects)			1.56*	1.16-2.10		3.51*	2.30-5.35		3.15*	2.23-4.45
Low family income (<€1,135)	157 (11.6)	40 (18.8)	1.23	0.78-1.92	34 (34.7)	1.88*	1.09-3.24	38 (25.3)	1.63*	1.01-2.64
(univariate effects)			1.77*	1.21-2.60		4.07*	2.60-6.37		2.60*	1.74-3.89
Low IQ (wisc < 85)	180 (13.2)	44 (20.7)	1.43	0.96-2.12	37 (37.8)	2.27*	1.40-3.67	39 (26.0)	1.43	0.93-2.20
(univariate effects)			1.71*	1.18-2.46		3.97*	2.57-6.15		2.30*	1.55-3.42
T1 Psycho-pathology	mean (SD)	mean (SD)	OR	95% CI	mean (SD)	OR	95% CI	mean (SD)	OR	95% CI
CBCL Int	0.25 (0.19)	0.24 (0.21)	0.81*	0.67-0.98	0.25 (0.20)	0.75*	0.58-0.97	0.26 (0.21)	0.96	0.78-1.18
(univariate effects)			0.97	0.84-1.12		1.00	0.81-1.23		1.09	0.92-1.28
CBCL Ext	0.22 (0.19)	0.29 (0.21)	1.38*	1.17-1.62	0.31 (0.27)	1.43*	1.14-1.79	0.29 (0.24)	1.29*	1.06-1.56
(univariate effects)			1.38*	1.21-1.57		1.48*	1.24-1.76		1.34*	1.15-1.57
YSR Int	0.37 (0.24)	0.33 (0.21)	0.88	0.75-1.03	0.36 (0.25)	0.88	0.71-1.10	0.33 (0.24)	0.77*	0.64-0.94
(univariate effects)			0.85*	0.73-0.99		0.96	0.78-1.17		0.85	0.71-1.02

*p < .05; Odds ratios (OR) and 95% confidence intervals (CI) from multivariate multinomial logistic regression analysis; CBCL = Child Behavior Checklist (parent report); YRS = Youth Self Report; Int = Internalizing; Ext = Externalizing; CBCL and YSR scores standardized; univariate effects of single multinomial regression analyses italicized. Nagelkerke R² = 0.159.

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