Early maternal age at first birth is associated with chronic diseases and poor physical performance in older age: cross-sectional analysis from the International Mobility in Aging Study

Table 4 Association between age at first birth and poor physical performance, defined as SPPB ≤8 (N = 907)

	Model 1		Model 2		Model 3
	OR (95% CI)	p-value	OR (95% CI)	p-value	OR (95% CI)	p-value
Age 1st birth
≤18	1.81 (1.21 – 2.69)		1.75 (1.17 – 2.64)		1.48 (0.96 – 2.28)	0.07
>18	1	<0.01	1	<0.01	1
Age¹	1.12 (1.06 – 1.18)	<0.01	1.12 (1.06 – 1.18)	<0.01	1.11 (1.04 – 1.17)	<0.01
Education
≤8 years	1.59 (1.03 – 2.46)		1.58 (1.01 – 2.45)		1.72 (1.08 – 2.72)
>9 years	1	0.04	1	0.04	1	0.02
Childhood economic adversity²	1.22 (1.02 – 1.46)	0.03	1.22 (1.02 – 1.47)	0.03	1.17 (0.97 – 1.42)	0.10
Study Site
St Hyacinthe	1.08 (0.58 – 1.98)	0.82	1.07 (0.58 – 1.98)	0.82	1.05 (0.55 – 2.00)	0.88
Tirana	3.33 (1.89 – 5.87)	<0.01	3.33 (1.89 – 5.86)	<0.01	3.45 (1.86 – 6.40)	<0.01
Manizales	1.13 (0.58 – 2.21)	0.72	1.10 (0.56 – 2.17)	0.78	1.42 (0.70 – 2.89)	0.33
Natal	2.70 (1.41 – 5.18)	<0.01	2.69 (1.40 – 5.18)	<0.01	3.38 (1.66 – 6.87)	<0.01
Kingston	1		1		1	1
Parity
≥3 children			1.04 (0.72 – 1.50)		1.06 (0.72 – 1.56)
<3 children			1	0.82	1	0.77
Diabetes³
Yes					1.68 (1.15 – 2.45)
No					1	<0.01
Stroke
Yes					2.76 (1.43 – 5.32)
No					1	<0.01
Arthritis
Yes					2.08 (1.47 – 2.97)
No					1	<0.01
Cancer
Yes					2.08 (1.10 – 3.93)
No					1	0.02
Lung disease
Yes					2.20 (1.41 – 3.45)
No					1	<0.01
Coronary heart disease
Yes					1.64 (1.11 – 2.41)
No					1	<0.01
Osteoporosis
Yes					0.98 (0.69 – 1.40)
No					1	0.93
High blood pressure
Yes					1.00 (0.70 – 1.44)
No					1	0.99

¹Age was centred at 64 because participants were only eligible for the study if they were between 64 and 75 years of age. The odds ratio corresponds to each addition year of age after 64.
²Childhood economic adversity scores can vary from 0 to 3. A point was given for each of the following self-reported childhood circumstances: poverty, hunger, and parental unemployment.
³Chronic diseases are self-reported measures.

ISSN: 1471-2458