TABLE 3.

Geometric means and 95% confidence intervals (CI), medians, and percentage of elevated values of C-reactive protein (CRP, mg/l) by gestational age

Gestational age (weeks)	n	Geometric meana (95% CI)	Median	% >5.0 mg/l
Measurement period 1
6	119	0.81 (0.65, 1.01)	0.72	5.9
8	136	0.99 (0.81, 1.22)	0.85	10.3
10	106	1.62 (1.32, 1.98)	1.77	12.3
12	88	1.94 (1.54, 2.45)	1.79	21.6
14	111	2.07 (1.64, 2.60)	2.30	23.4
16	93	2.18 (1.71, 2.78)	2.31	26.9
18	97	2.18 (1.73, 2.75)	2.15	28.9
20	84	2.85 (2.23, 3.65)	3.31	35.7
Measurement period 2
28	247	3.22 (2.86, 3.62)	2.82	32.4
29	212	3.43 (3.00, 3.92)	3.82	36.8
30	155	3.52 (3.00, 4.14)	3.43	40.7
31	121	3.42 (2.88, 4.06)	3.31	37.2
32	99	3.89 (3.31, 4.57)	3.96	36.4

^aLinear regression for trend tests, P < 0.0001.