Table 1.

Sample characteristics in a national registry-linkage study of maternal outcomes associated with teenage childbearing for teenage and adult mothers born in Sweden 1970-1979

	All Mothers		Teen Mothers		Adult Mothers
Variable	N	(M)%	N	(M)%	N	(M)%
Mean maternal age at first birth
Mothers	356,750	27.3	19,351	18.7	337,399	27.9
Early adulthood outcomes
Criminal conviction between ages 20-30	13,909	3.9%	2,039	10.5%	11,870	3.52%
Criminal conviction between ages 15-30	31,381	8.8%	3,942	20.4%	27,439	8.13%
Maternal educational achievement
Less than 10 years of education (ref)	22,283	6.25%	5,439	28.1%	16,844	5.0%
At least 10 years of education	334,325	93.71%	13,863	71.6%	320,462	95.0%
Missing education level	142	0.04%	49	0.3%	93	0.0%
Individual-level covariates
Birth order
1st born (ref)	266325	74.7%	13482	69.7%	252843	74.9%
2nd born	81,762	22.9%	4,982	25.7%	76780	22.8%
3rd born or greater	8663	2.4% (30.1)	887	4.6% (23.1)	7776	2.3% (30.5)
Father's age at mother's first birth
Mean age
< 20 years old	4,876	1.31%	3,621	13.26%	1,255	0.37%
20-24 years old	50,769	13.65%	10,782	39.47%	39,987	11.60%
25-29 years old (ref)	121,449	32.65%	3,527	12.91%	125,217	36.33%
30-35 years old	118,035	31.73%	736	2.69%	117,299	34.03%
> 35 years old	55,405	14.89%	256	0.94%	55,149	16.00%
Missing father's age	6,216	1.67%	429	1.57%	5,787	1.68%
Father's educational achievement
Less than 10 years of education (ref)	33,788	9.5%	4,820	24.9%	28,968	8.6%
At least 10 years of education	315,118	88.3%	13,994	72.3%	301,124	89.2%
Missing education level	7,844	2.2%	537	2.8%	7,307	2.2%
Maternal lifetime criminal history	34,434	9.65%	4,466	23.1%	29,968	8.88%
Father lifetime criminal history	125,046	35.0%	12,558	64.9%	112,488	33.34%