Table 6

Linear regression on effects of years after burn injury, months follow-up in hospital and burn severity by TBSA on mean NAPLAN scores

Domain	Estimate	SE	t-value	P value
Effect of increase in years after burn injury, by year on NAPLAN average performance
Year 3
Grammar and punctuation	2.81	1.34	2.11	<0.05
Reading	1.56	1.28	1.22	0.22
Spelling	2.48	1.18	2.10	<0.05
Writing	0.8	1.11	0.72	0.47
Numeracy	1.41	1.07	1.32	0.19
Year 5
Grammar and punctuation	5.36	1.18	4.53	<0.001
Reading	4.11	1.07	3.84	<0.001
Spelling	5.34	1.15	4.65	<0.001
Writing	5.14	1.17	4.40	<0.001
Numeracy	4.13	1.06	3.89	<0.001
Year 7
Grammar and punctuation	0.90	1.80	0.50	0.6168
Reading	0.79	1.41	0.56	0.5786
Spelling	2.47	1.51	1.64	0.1020
Writing	0.99	1.59	0.62	0.5349
Numeracy	0.77	1.48	0.52	0.6044
Effect of increased follow-up in hospitalisation, by month on NAPLAN average performance
Year 3
Grammar and punctuation	−0.16	0.10	−1.62	0.11
Reading	−0.05	0.10	−0.52	0.61
Spelling	−0.21	0.09	−2.37	<0.05
Writing	−0.20	0.08	−2.43	<0.05
Numeracy
Year 5
Grammar and punctuation	0.00	0.09	0.01	0.99
Reading	−0.04	0.08	−0.50	0.62
Spelling	0.07	0.09	0.82	0.41
Writing	−0.06	0.09	−0.67	0.51
Numeracy
Year 7
Grammar and punctuation	−0.11	0.10	−1.05	0.30
Reading	−0.15	0.08	−1.76	0.08
Spelling	−0.06	0.09	−0.65	0.51
Writing	−0.1368	0.09	−1.48	0.14
Numeracy
Effect of increase in TBSA by 10% on NAPLAN average performance
Year 3
Grammar and punctuation	8.63	15.93	−0.54	0.59
Reading	−26.08	14.99	−1.74	0.08
Spelling	−29.84	14.17	−2.11	<0.05
Writing	−8.04	12.94	−0.62	0.53
Numeracy	−12.4	12.6	−0.98	0.32
Year 5
Grammar and punctuation	−50.04	12.53	−4.00	<0.001
Reading	−34.56	11.16	−3.10	<0.05
Spelling	−47.61	11.22	−4.24	<0.001
Writing	−71.89	11.98	−6.00	<0.001
Numeracy	−37.01	10.81	−3.42	<0.001
Year 7
Grammar and punctuation	0.38	4.31	0.09	0.93
Reading
Spelling	−3.54	3.51	−1.01	0.31
Writing	11.23	4.18	2.69	<0.05
Numeracy	−1.87	3.59	−0.52	0.60
Rates of burn severity by TBSA in burn injury cohort
TBSA (%)	Rate (%)
<10	1362 (87.5)
10–19	132 (8.5)
20–29	36 (2.3)
30–39	14 (0.9)
40–49	8 (0.5)
50–59	1 (0.1)
60–69	0
70–79	0
80–89	1 (0.1)
90–99	2 (0.2)

NAPLAN, National Assessment Plan for Literacy and Numeracy; TBSA, total body surface area.