Table 6.

Age-related serum IgG1 levels in healthy children (mg/dL).

Age group	Number	Geometric mean ± SD	Mean ± SD	Min–max	95% confidence interval
25–36 months	30	510.74 ± 192.04	531.7 ± 192.04	309–1450	459.98–603.41
3–5 years	30	506.73 ± 82.28	513.93 ± 82.28	273–679	483.20–544.65
6–8 years	30	567.94 ± 121.64	581 ± 121.64	292–781	535.87– 626.72
9–11 years	30	634.17 ± 216.39	660.23 ± 216.39	410–153	579.43–741.03
12–16 years	30	635.52 ± 131.01	648.53 ± 131.01	344–958	599.61–697.45
16–18 years	30	645.35 ± 229.62	674.5 ± 229.62	403–1520	588.75–760.24
Total	180	580.41 ± 179.97	601.7 ± 179.97	273–1530	575.22–628.17

IgG1: Immunoglobulin G1