Table 2

Sample characteristics at birth obtained from medical records, and at age 72–74 years obtained from HUSK
N Mean (SD*) Proportion (%)
From medical records
Birth weight (kg) 346 3.47 (0.53) -
Birth length (cm) 346 50.27 (2.11) -
Head circumference (cm) 344 34.42 (1.70) -
Ponderal index (weight/height3) 346 2.64 (0.24) -
Mother’s pelvic size (cm)a 324 26.10 (1.33) -
Mother’s age 346 29.40 (5.85) -
Parity (number of births) 346 2.61 (1.95) -
Gender (% female) 346 - 53.8%
Mother’s condition after birth (% good) 346 - 90.2%
Tuberculosis in family (% no) 346 - 88.7%
CVD in family (% no) 346 - 87.0%
Mother’s appearance (% good) 346 - 76.3%
Complications birth (% no)b 346 - 89.6%
Socioeconomic status (% lower) 346 - 55.8%
Unmarried (% no) 346 - 96.2%
Teeth lower jaw (% good) 335 - 42.1%
Type of payment (% no insurance) 245 - 44.1%
Number of diseases (%≤1) 346 - 69.4%
From HUSK at age 72–74 years
Composite scorec 346 0.08 (0.95) -
Separate cognitive testd
MMS 346 11.55 (0.85) -
Digit Symbol 346 10.60 (4.37) -
KOLT 346 35.49 (7.86) -
COWAT 346 15.51 (5.40) -
TMA 346 55.23 (29.06) -
Block Design 346 15.01 (2.08) -

*Standard deviation.

aMean of the interspinous distance, the intercristal distance and the external conjugate in centimeters.

bIncluding, but not limited to, prolonged labour, abnormal presentation assisted delivery of the baby (use of forceps) and episiotomy, uterine rupture, discoloured amniotic fluid, abnormal fetal souffle and placenta praevia, and combinations of these.

cComposite score: Z-score of the sum of all cognitive tests (mean: 0, standard deviation: 1).

dTest-specific raw scores for each cognitive tests (see methods section for further details).

Skogen et al.

Skogen et al. BMC Psychology 2013 1:16   doi:10.1186/2050-7283-1-16

Open Data