Table 5.

Multiple comparisons of Hb mean values at visits of different gestational ages using post hoc Tukey test

Visit at	Visit at	Mean Difference	Std. Error	Sig. (p value)	95% Confidence Interval of the mean difference
					Lower Bound	Upper Bound
Booking visit	20 weeks GA	3.282*	.3195	.000	2.410	4.155
	26 weeks GA	4.184*	.3092	.000	3.340	5.029
	32 weeks GA	.947*	.3195	.026	.074	1.820
	36 weeks GA	-.228	.2087	.810	-.798	.342
20 weeks gestation	Booking visit	-3.28*	.3195	.000	-4.155	-2.410
	26 weeks GA	.902	.4263	.214	-.262	2.067
	32 weeks GA	-2.335*	.4338	.000	-3.520	-1.150
	36 weeks GA	-3.510*	.3600	.000	-4.494	-2.527
26 weeks gestation	Booking visit	-4.184*	.3092	.000	-5.029	-3.340
	20 weeks GA	-.902	.4263	.214	-2.067	.262
	32 weeks GA	-3.237*	.4263	.000	-4.402	-2.073
	36 weeks GA	-4.412*	.3510	.000	-5.371	-3.454
32 weeks visit	Booking visit	-.947*	.3195	.026	-1.820	-.074
	20 weeks GA	2.335*	.4338	.000	1.150	3.520
	26 weeks GA	3.237*	.4263	.000	2.073	4.402
	36 weeks GA	-1.175*	.3600	.010	-2.159	-.192
36 weeks visit	Booking visit	.2280	.2087	.810	-.342	.798
	20 weeks GA	3.510*	.3600	.000	2.527	4.494
	26 weeks GA	4.412*	.3510	.000	3.454	5.371
	32 weeks GA	1.175*	.3600	.010	.192	2.159