Table 4.

Birth weight and achieved body weight in young adult age predicting adult lung function

		MPP							MOS
		Mean difference	Standard error	Sig (p)	Confidence interval				Mean difference	Standard error	Sig (p)	Confidence interval
					Lower	Upper						Lower	Upper
FEV1 (z-score)
Group 1 (N = 898)	Group 2 (N = 2805)	0.115	0.04	0.05	0.0001	0.230	Group 1 (N = 340)	Group 2 (N = 375)	0.05	0.07	0.87	− 0.124	0.228
Reference	Group 3 (N = 2570)	0.019	0.05	0.97	− 0.097	0.136	reference	Group 3 (N = 261)	− 0.14	0.08	0.23	− 0.336	0.05
	Group 4 (N = 701)	0.171	0.06	0.02	0.019	0.322		Group 4 (N = 306)	0.10	0.07	0.46	− 0.08	0.29
FVC (z-score)
Group 1 (N = 899)	Group 2 (N = 2806)	0.136	0.04	0.008	0.026	0.246	Group 1 (N = 339)	Group 2 (N = 375)	− 0.08	0.07	0.60	− 0.256	0.089
Reference	Group 3 (N = 2572)	0.012	0.04	0.993	− 0.01	0.123	reference	Group 3 (N = 261)	− 0.10	0.07	0.51	− 0.291	0.088
	Group 4 (N = 703)	0.132	0.06	0.090	− 0.013	0.277		Group 4 (N = 306)	− 0.14	0.07	0.21	− 0.319	0.044
FEV1/FVC (z-score)
Group 1 (N = 884)	Group 2 (N = 2778)	− 0.018	0.05	0.985	− 0.148	0.113	Group 1 (N = 339)	Group 2 (N = 375)	0.24	0.07	0.002	0.067	0.421
Reference	Group 3 (N = 2531)	0.014	0.05	0.993	− 0.118	0.146	reference	Group 3 (N = 261)	− 0.03	0.08	0.97	− 0.227	0.162
	Group 4 (N = 697)	0.074	0.07	0.678	− 0.097	0.245		Group 4 (N = 306)	0.41	0.07	< 0.001	0.223	0.595

^*p < 0.05 indicates statistical significance; two-way ANOVA has been performed; BW: birth weight; W: weight

Group 1 = low birth weight and low weight in adult age (reference group); group 2 = high birth weight and high weight in adult age; group 3 = high birth weight and low weight in adult age; group 4 = low birth weight and high weight in adult age. Comparisons of the mean z-score were made between subgroups (1–4)