Table 1.

GP utilisation by adolescents overall and after intervention

	Control group			Intervention group

	Males (n = 489)	Females (n = 489)	Total (n = 978)	Males (n = 487)	Females (n = 488)	Total (n = 975)
Proportion seeing GP, ratio (95% CI)	0.54 (0.50 to 0.59)	0.63 (0.58 to 0.67)	0.59 (0.55 to 0.62)	0.72 (0.68 to 0.76)^a	0.66 (0.62 to 0.70)	0.69 (0.66 to 0.72)^a
Proportion seeing GP for reason mentioned in letter,^b ratio (95% CI)	0.38 (0.29 to 0.47)	0.50 (0.41 to 0.59)	0.44 (0.38 to 0.50)	0.55 (0.46 to 0.64)	0.52 (0.43 to 0.61)	0.54 (0.48 to 0.60)
Total number of contacts	709	1043	1752	966	1126	2092
Contacts per person in group under study, ratio (95% CI)	1.5 (1.3 to 1.6)	2.1 (1.9 to 2.4)	1.8 (1.6 to 1.9)	2.0 (1.8 to 2.2)	2.3 (2.1 to 2.6)	2.2 (2.0 to 2.3)
Contacts per patient attending the surgery, ratio (95% CI)	2.7 (2.4 to 2.9)	3.4 (3.1 to 3.7)	3.0 (2.8 to 3.3)	2.8 (2.5 to 3.0)	3.5 (3.2 to 3.8)	3.1 (2.9 to 3.3)

↵a P<0.001 for difference between proportions in intervention and control groups.
↵b As diagnosed by the GP and relating to first contacts only.