Table 2.

Relationships between maternal BMI and son's BMI at each target age

Target age	N	Spearman correlation (rho)	Standardized β coefficient
0	177	0.047	0.037
0.5	153	−0.041	−0.038
1	155	−0.072	−0.089
1.5	147	−0.040	−0.069
2	144	−0.038	−0.048
2.5	136	0.056	0.098
3	151	0.075	0.120
4	154	0.055	0.106
5	157	0.171	0.247**
6	148	0.206*	0.310**
7	159	0.207*	0.311**
8	156	0.165	0.293**
9	148	0.221*	0.326**
10	155	0.216*	0.302**
11	150	0.159*	0.251**
12	143	0.220*	0.324**
13	145	0.226*	0.258**
14	148	0.260*	0.355**
15	141	0.273*	0.350**
16	137	0.266*	0.298**
17	137	0.263*	0.224**
18	74	0.264*	0.268**

Standardized β coefficients were obtained from linear regression models adjusting for maternal birth year.

^* Significance at p ≤ 0.05.

^** Significance at adjusted p ≤ 0.05.

BMI, body mass index; N, sample size.