Table 1.

Presentation of oral complications among NF1 patients and NF1- controls

Index	Age subgroups	Mean of NF1- controls	Mean of NF1 + cases	Mean difference (95% CI) = values of NF1 + —that of NF1-	P value
Salivary flow rate	< 20	0.340	0.335	− 0.005 (− 0.019–0.0092)	0.45
Salivary flow rate	21–40	0.321	0.293	− 0.029 (− 0.047– − 0.011)	0.005
Salivary flow rate	> 40	0.292	0.173	− 0.12 (− 0.15– − 0.09)	< 0.0001
Amylase activity	< 20	0.387	0.374	− 0.013 (− 0.03–0.0083)	0.15
Amylase activity	21–40	0.377	0.323	− 0.053 (− 0.075– − 0.033)	0.0008
Amylase activity	> 40	0.360	0.292	− 0.068 (− 0.089– − 0.047)	< 0.0001
Salivary pH value	< 20	7.04	7.08	0.032 (− 0.068–0.13)	0.49
Salivary pH value	21–40	7.10	7.80	0.70 (0.46–0.94)	< 0.0001
Salivary pH value	> 40	7.17	8.27	1.10 (0.911.27)	< 0.0001
PI	< 20	0.49	0.66	0.16 (− 0.016–0.35)	0.07
PI	21–40	1.46	3.70	2.25 (0.69–3.80)	0. 009
PI	> 40	4.80	6.53	1.73 (0.16–3.31)	0.03
DMFT score	< 20	1.86	1.25	− 0.61 (− 2.80–1.59)	0.55
DMFT score	21–40	4.62	9.5	4.88 (0.33–9.41)	0.04
DMFT score	> 40	7.71	22.67	14.95 (12.44–17.47)	< 0.0001