TABLE 3—

Multivariate Associations of Childhood Intelligence at the Age of 7 Years With at Least 1 Unintentional Injury Hospital Admission in Cohort Overall and Stratified by Intelligence Score: Aberdeen Children of the 1950s Cohort, Aberdeen, Scotland

	Hazard Ratioa (95% Confidence Interval)
	Model 1b	Model 2c	Model 3d	Model 4e	Model 5f	Model 6g
All participants	0.75 (0.70, 0.80)	0.79 (0.73, 0.84)	0.79 (0.73, 0.84)	0.79 (0.74, 0.85)	0.83 (0.76, 0.89)	0.85 (0.78, 0.91)
Participants with IQ score < 100	0.72 (0.62, 0.83)	0.73 (0.63, 0.85)	0.73 (0.63, 0.85)	0.75 (0.64, 0.86)	0.76 (0.65, 0.88)	0.76 (0.65, 0.88)
Participants with IQ score ≥ 100	0.81 (0.71, 0.92)	0.83 (0.73, 0.94)	0.82 (0.73, 0.93)	0.82 (0.73, 0.93)	0.97 (0.81, 1.13)	0.97 (0.81, 1.14)

Note. Analyses were conducted with 10 multiple imputation data sets, which allowed all 11 103 participants to contribute to the analyses.

^a For at least 1 hospital admission categorized as an unintentional injury per each increase of 1-standard-deviation in intelligence score at the age of 7 years.

^b Adjusted for gender only.

^c Same as model 1 plus indicators of socioeconomic position: father’s occupational social class at time of birth, mother’s previous number of pregnancies, born outside marriage, and mother’s age and height.

^d Same as model 2 plus birthweight.

^e Same as model 3 plus childhood height and weight.

^f Adjusted for educational attainment only.

^g Same as model 4 plus educational attainment.