Psychosocial developmental trajectory of a cohort of young adults born very preterm and/or with a very low birth weight in the Netherlands

van der Pal, Sylvia M.; Maurice-Stam, Heleen; Grootenhuis, Martha A.; van Wassenaer-Leemhuis, Aleid G.; Verrips, Gijsbert H. W.

doi:10.1186/s41687-019-0106-5

Journal of Patient-Reported Outcomes

Table 1 Demographic and Neonatal characteristics: participants versus non-participants

From: Psychosocial developmental trajectory of a cohort of young adults born very preterm and/or with a very low birth weight in the Netherlands

	Total		Participants		Non-participants		Participants vs non-participants
	%	N	%	N	%	N	p-value
Gender							0.000
Female	48.2	461	62.7	188	41.6	273,384
Male	51.8	496	37.3	112	58.4
Origin							0.000
Caucasian	85.3	810	93.6	278	81.5	532
Non-Caucasian	14.7	140	6.4	19	18.5	121
Highest educational level parents ^a,^b
Low	38.9	340	26.8	78	44.9	262	0.000
Middle	36.3	317	39.2	114	34.8	203
High	24.8	217	34.0	99	20.2	118
Social economic level parent ^c							0.000
Very low	10.1	95	3.4	10	13.3	85
Low	32.3	302	27.2	81	34.6	221
Bit low	22.0	206	22.1	66	21.9	140
Bit high	9.0	84	10.4	31	8.3	53
High	16.2	152	21.5	64	13.8	88
Very high	10.4	97	15.4	46	8.0	51
Maternal age at time of birth (yrs) ^d
Mean (SD)	27.2 (4.9)		28.2 (4.3)		26.8 (5.0)		0.000
range	13.3–43.6		18.0–42.6		13.3–43.6		0.000
< 20	5.2	49	0.7	2	7.2	47	0.000
≥ 20 and < 36	90.9	855	94.5	275	89.2	580
≥36	3.9	37	4.8	14	3.5	23
Birth weight (grams)
Mean (SD)	1313.3 (282.7)		1312.5 (305.9)		1313.7 (271.7)		0.951
range	560–2580		560–2580		600–2400		0.951
≤ 1000	14.5	139	14.7	44	14.5	95	0.353
1001–1250	27.0	258	28.3	85	26.3	173
1251–1500	38.6	369	34.7	104	40.3	265
> 1500	20.0	191	22.3	67	18.9	124
Gestational age (weeks) ^e
Mean (SD)	31.0 (2.5)		31.0 (2.3)		31.1 (2.6)		0.534
range	25.4–40.9		26.0–37.6		25.4–40.9		0.534
Appropriate for gestational age (yes) ^e	62.8	600	61.2	183	63.6	417	0.516
Mechanical ventilation (days) ^f
Mean (SD)	4.8 (9.5)		4.7 (8.0)		4.8 (10.1)		0.823
range	0.0–117.0		0.0–43.0		0.0–117.0		0.823
None	0.0	0	0.0	0	0.0	0	0.741
1–7	79.1	756	78.3	235	79.4	521
8–28	17.5	167	18.7	56	16.9	111
> 28	3.5	33	3.0	9	3.7	24
IRDS (yes)	39.0	373	42.3	127	37.4	246	0.154
ICH (yes)	17.2	165	19.0	57	16.4	108	0.356
Disability at age 14 ^g							0.029
none	49.8	421	51.9	149	48.7	272
impairment (1 or 2 small)	27.7	234	30.3	87	26.3	147
mild disability (> 2 small or 1 large)	16.3	138	14.6	42	17.2	96
severe disability (> 1 large)	6.3	53	3.1	9	7.9	44

Participants: Survivors of the POPS cohort at age 28 who completed the Course of Life Questionnaire
Non-participants: Survivors of the POPS cohort at age 28 who did not complete the Course of Life Questionnaire
^aLow = primary education, lower vocational education; Middle = general secondary education, middle vocational education; High = higher vocational education, university
IRDS: idiopathic respiratory distress syndrome; ICH: intracerebral hemorrhage
^b83 unknown: participants 9, non-participants 74
^c21 unknown: participants 2, non-participants 19
^d16 unknown: participants 9, non-participants 7
^e2 unknown: participants 2, non-participants 0
^f1 unknown: participants 0, non-participants 1
^g111 unknown: participants 13, non-participants 98

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