Table 5.

Multiple regression models for performance tests (grip strength, gait speed and chair stand) by the composite age at first birth/ parity variable (N = 473)

	Model 1		Model 2		Model 3
Grip strength (Kgf)	β (95 % CI)	p value	β (95 % CI)	p value	β (95 % CI)	p value
First child before 18 and ≥3 children	−1.613 (-2.938 : -0.289)	0.017	−1.236 (-2.599 : 0.127)	0.076	−1.350 (-2.730 : 0.030)	0.055
First child before 18 and <3 children	1.438 (-1.533 : 4.409)	0.342	0.726 (-2.236 : 3.688)	0.630	0.993 (-2.083 : 4.070)	0.526
First child at 18y or more and ≥3 children	−0.924 (-2.007 : 0.160)	0.095	−0.504 (-1.602 : 0.594)	0.367	−0.478 (-1.591 : 0.635)	0.399
First child at 18y or more and <3 children	0		0		0
Gait speed (m/s)
First child before 18 and ≥3 children	−0.030 (-0.076 : 0.016)	0.194	−0.018 (-0.066 : 0.030)	0.471	−0.016 (-0.064 : 0.031)	0.495
First child before 18 and <3 children	0.067 (-0.036 : 0.170)	0.201	0.065 (-0.039 : 0.168)	0.221	0.064 (-0.041 : 0.169)	0.233
First child at 18y or more and ≥3 children	−0.018 (-0.055 : 0.020)	0.356	−0.010 (-0.048 : 0.029)	0.615	−0.003 (-0.041 : 0.035)	0.871
First child at 18y or more and <3 children	0		0		0
Chair stands (s)
First child before 18 and ≥3 children	0.672 (0.157 : 1.187)	0.011	0.618 (0.081 : 1.156)	0.024	0.655 (0.113 : 1.197)	0.018
First child before 18 and <3 children	0.396 (-0.739 : 1.532)	0.493	0.573 (-0.571 : 1.718)	0.326	0.829 (-0.356 : 2.014)	0.170
First child at 18y or more and ≥3 children	0.401 (-0.019 : 0.821)	0.061	0.324 (-0.107 : 0.756)	0.140	0.379 (-0.058 : 0.815)	0.089
First child at 18y or more and <3 children	0		0		0

Model 1: Unadjusted. Model 2: Adjusted for age and education. Model 3: Adjusted for age, education, physical activity, menopausal status and hysterectomy