Table 3 Univariable regression using mean SD cut-off points for association between maternal HRQoL and development of VLBW children at 2.5 years old

Communication

356

Above 1 SD below the mean [Reference]

197 (55.3%)

-

-

Between 1–2 SD below the mean

73 (20.5%)

-1.316 (-3.346—0.714)

-0.422 (-2.096—1.251)

Below 2 SD below the mean

86 (24.2%)

-0.825 (-2.740—1.090)

-0.994 (-2.573—0.584)

Gross motor

356

Above 1 SD below the mean [Reference]

184 (51.7%)

-

-

Between 1–2 SD below the mean

66 (18.5%)

-1.090 (-3.218—1.038)

0.396 (-1.331—2.122)

Below 2 SD below the mean

106 (29.8%)

-0.556 (-2.365—1.252)

-2.410 (-3.877—-0.943)

Fine motor

353

Above 1 SD below the mean [Reference]

201 (56.9%)

-

-

Between 1–2 SD below the mean

65 (18.4%)

-0.506 (-2.629—1.617)

-0.125 (-1.860—1.610)

Below 2 SD below the mean

87 (24.6%)

-0.543 (-2.452—1.367)

-2.145 (-3.705—-0.585)

Problem- solving

356

Above 1 SD below the mean [Reference]

205 (57.6%)

-

-

Between 1–2 SD below the mean

53 (14.9%)

-1.086 (-3.373—1.200)

-1.482 (-3.348—0.384)

Below 2 SD below the mean

98 (27.5%)

-0.411 (-2.233—1.412)

-1.929 (-3.416—-0.442)

Personal- social

357

Above 1 SD below the mean [Reference]

174 (48.7%)

-

-

Between 1–2 SD below the mean

102 (28.6%)

0.349 (-1.502—2.199)

-0.783 (-2.298—0.732)

Below 2 SD below the mean

81 (22.7%)

-0.133 (-2.129—1.863)

-1.828 (-3.462—-0.194)

Overall

353

No domain below 2 SD below the mean [Reference]

178 (50.4%)

-

-

Any domain below 2 SD below the mean

175 (49.6%)

-0.417 (-1.999—1.165)

-1.175 (-2.476—0.125)

Overall (2 domains)

350

One or no domain below 2 SD below the mean [Reference]

244 (69.7%)

-

-

At least 2 domains below 2 SD below the mean

106 (30.3%)

-0.326 (-2.059—1.407)

-2.260 (-3.670—-0.849)