Table 1.

Demographic, socio‐economic, environmental, and educational profiles of participants at each study visit.^a

	SV1	SV2	SV3	SV4	SV5
	n = 467a	n = 378a	n = 333a	n = 376a	n = 269a
Child ageb (months)	1·9 (0·9)	7·8 (1·4)	13·4 (2·1)	20·1 (2·4)	40·0 (3·9)
Mother age at baselineb (years)	30·2 (5·3)	30·5 (5·3)	30·5 (5·2)	30·8 (5·1)	31·3 (5·1)
Child gender malec	240 [51]	198 [52]	178 [53]	200 [53]	140 [52]
Had healthcare cardc	178 [38]	132 [35]	106 [32]	125 [33]	73 [27]
Mother born in Australiac	305 [65]	260 [69]	241 [72]	261 [69]	193 [72]
Mother speak English at homec	344 [74]	296 [78]	269 [81]	293 [78]	216 [80]
Mother education levelc
No post‐school education	98 [21]	75 [20]	58 [17]	69 [18]	36 [13]
Certificate/diploma/advanced diploma/apprenticeship	186 [40]	152 [40]	133 [40]	151 [40]	103 [38]
Bachelor degree or higher	180 [39]	150 [40]	142 [43]	156 [41]	129 [48]
Residential Regionc
Metropolitan	303 [65]	240 [63]	198 [59]	234 [62]	160 [59]
Regional	53 [11]	47 [12]	47 [14]	49 [13]	43 [16]
Rural	111 [24]	91 [24]	88 [26]	94 [25]	66 [25]
Water fluoridationc
Live in fluoridated neighbourhood	354 [76]	286 [76]	245 [74]	281 [75]	200 [74]
Live in non‐fluoridated neighbourhood	113 [24]	92 [24]	88 [26]	96 [25]	69 [26]

^aAll participants, including a few children whose data were excluded from the subsequent statistical analysis due to invalid odontograms (SV2 n = 4; SV3 n = 3; SV5 n = 1). Baseline information for 15 participants was not available.

^bValues are mean (standard deviation).

^cValues are number [%].