Table 1.

Total AIMS scores (mean ± SD) in early-term and full-term infants according to monthly age level.

	Early-Term (N = 559)		Full-Term (N = 528)
Monthly Age Level	N	AIMS Score	N	AIMS Score	Score Difference (95% CI)
0 to <1	12	5.0 ± 1.2	14	5.0 ± 1.4	0 (−1.1, 1.1)
1 to <2	18	7.2 ± 1.5	16	8.9 ± 2.2	1.7 (0.3, 2.8)
2 to <3	22	9.2 ± 1.5	30	10.2 ± 2.2	0.9 (−0.1, 2.1)
3 to <4	36	11.8 ± 2.2	39	12.3 ± 2.8	0.5 (−0.8, 1.7)
4 to <5	22	17.3 ± 2.4	24	17.2 ± 2.7	−0.2 (−1.7, 1.4)
5 to <6	26	22.0 ± 3.0	31	24.6 ± 4.0	2.6 (0.7, 4.5)
6 to <7	67	26.5 ± 3.8	65	28.8 ± 5.3	2.3 (0.8, 3.9)
7 to <8	64	31.4 ± 4.7	54	34.1 ± 5.5	2.6 (0.7, 4.5)
8 to <9	27	37.6 ± 5.9	29	39.8 ± 6.6	2.2 (−1.2, 5.6)
9 to <10	44	44.3 ± 6.2	43	44.8 ± 6.8	0.5 (−2.3, 3.2)
10 to <11	33	49.0 ± 4.9	29	47.7 ± 6.2	−1.4 (−4.2, 1.5)
11 to <12	27	49.3 ± 4.8	25	52.2 ± 2.3	2.9 (0.7, 4.9)
12 to <13	20	53.9 ± 1.7	22	54.6 ± 1.8	0.6 (−0.5, 1.8)
13 to <14	26	56.0 ± 2.3	14	55.9 ± 1.6	−0.1 (−1.4, 1.4)
14 to <15	18	56.5 ± 2.0	22	57.5 ± 0.8	0.9 (−0.0, 1.9)
15 to <16	23	57.8 ± 0.3	13	57.8 ± 0.4	−0.02 (−0.3, 0.2)
16 to <17	22	57.6 ± 1.1	19	57.9 ± 0.3	0.3 (−0.2, 0.9)
17 to <18	21	57.9 ± 0.3	17	57.9 ± 0.2	0.03 (−0.1, 0.2)
18 to <19	31	56.8 ± 6.8	22	58.0 ± 0.0	1.2 (−1.7, 4.2)

CI; confidence interval.