Table 2. Mean BMI and BMI Z-score by age and weight trajectory group (N = 1566).

	Groups
	1. Low, increasing		2. Low-medium, accelerating		3. Medium-high, increasing		4. High-stable		Total N
Variable	Mean (SD)	N	Mean (SD)	N	Mean (SD)	N	Mean (SD)	N
BMI Z-score 4 y	−1.90 (0.88)	118	−0.50 (0.78)	489	0.53 (0.79)	581	1.73 (0.71)	134	1322
BMI 4 y	13.7 (0.71)		15.0 (0.84)		16.2 (1.11)		18.4 (1.85)
BMI Z-score 6 y	−1.86 (1.00)	102	−0.55 (0.72)	407	0.52 (0.60)	497	1.73 (0.55)	116	1122
BMI 6 y	13.5 (0.84)		14.7 (0.87)		16.2 (1.06)		19.4 (2.20)
BMI Z-score 7 y	−1.67 (0.93)	133	−0.57 (0.68)	540	0.52 (0.56)	627	1.73 (0.52)	149	1449
BMI 7 y	13.7 (0.83)		14.8 (0.88)		16.5 (1.14)		20.5 (2.86)
BMI Z-score 8 y	−1.65 (0.91)	126	−0.40 (0.64)	477	0.66 (0.54)	566	1.83 (0.39)	135	1304
BMI 8 y	13.8 (0.87)		15.3 (0.99)		17.4 (1.40)		21.9 (2.65)
BMI Z-score 10 y	−1.15 (0.64)	116	−0.18 (0.63)	471	0.77 (0.61)	532	1.77 (0.46)	134	1253
BMI 10 y	14.9 (0.95)		16.6 (1.41)		19.2 (2.2)		24.3 (3.3)