Table 1. Age, sex information of children in study and number of sequences obtained.

Sample	Sex	Age (month)	Teeth number	dt	Raw reads num	Final reads num	OTU num*
C1	female	16.5	16	8	25656	5491	162
C2	male	19	16	6	20577	3135	139
C3	female	17.5	16	6	20733	2117	125
C4	female	17.5	16	12	24079	3924	143
C5	male	24.5	16	6	24224	5638	161
C6	male	19.5	16	4	30617	4221	219
C7	female	17.5	16	5	25274	4613	189
C8	female	24	15	4	24980	4979	160
C9	male	22	16	8	21847	4863	255
C10	female	13	12	10	23635	3108	142
CF1	male	18.5	16	0	23782	5644	229
CF2	male	16	16	0	26730	7990	249
CF3	female	13.5	16	0	25073	5728	236
CF4	female	18	16	0	20226	4351	248
CF5	male	19	13	0	27058	2556	156
CF6	female	18	10	0	19982	3120	209
CF7	female	22	15	0	17482	3151	149
CF8	male	22	16	0	18853	3560	182
CF9	male	24	16	0	8762	1938	149

^* Operational Taxonomical Unit (OTU) at 3% dissimilarity based upon high quality sequence selected MOTHUR observed rarefaction.