School-based strategies for oral health education of adolescents- a cluster randomized controlled trial

BMC Oral Health

Table 3 Percent change in adjusted mean scores ^† and significant group differences at baseline (BL) & evaluation IV

	Percent change					Significant group differences
	DL	TL	PL	SL	CL	p-values
OHK^a	25.33	22.75	26.83	6.17	4.08	IV: DL, TL, PL > SL, CL^**
KGO^b	31.60	20.40	31.80	4.20	4.80	IV: DL, TL, PL > SL, CL^**
OHB^c	32.58	29.58	37.50	5.00	0.67	IV: DL, TL, PL > SL, CL^*; PL > TL^; SL > CL^*
OHS^d	8.33	11.42	12.59	−10.00	−1.83	BL: SL > DL, TL, PL, CL^; IV: DL, TL ,PL > SL, CL^*
PLQ^e‡	−10.42	−9.58	−8.42	6.42	−2.25	BL: SL > DL, TL, PL, CL^; IV: DL, TL, PL > SL, CL^*
BOP^f‡	−5.50	−8.75	−10.67	0.08	1.83	IV: DL, TL, PL > CL^, TL, PL > SL^, DL>SL^*
CAL^g‡	6.75	7.50	5.09	3.25	2.50	BL: DL, TL > CL^*
KBS^h	22.08	21.30	25.92	0.39	1.14	BL: SL > CL (p=.042), IV: DL, TL, PL > SL, CL^**

^†All scores adjusted for sex, type of school and clustering effect using Generalized Estimating Equations.
DL: Dentist-led; TL: Teacher-led; PL: Peer-led; SL: Self-learning; CL: Control groups.
^aOral health knowledge (total score: 12); ^bKnowledge about gingivitis and oral cancer (total score: 5); ^cOral health behavior (total score: 12).
^dOral hygiene status (total score: 12, indicates the number of sextants of oral cavity free of plaque, bleeding on probing and calculus).
^ePlaque (total score: 12); ^fBleeding on probing (total score: 12); ^gCalculus (total score: 12) (^‡A negative sign associated with percent change shows a decrease and an improvement in score and vice versa for a positive sign, and a statistically better score has a lower value).
^hOral health knowledge, oral health behavior and oral hygiene status (total score: 36); ^*P<.05; ^**P<.001.

ISSN: 1472-6831