Table 1

Quarterly dyspepsia drug costs (section 1.3 of the British National Formulary) in West and East Gloucestershire for the period 1991–97, expressed as pence/quarter/head of population

Timing of measurements
Quarter	Gap in months	Time from zero in months	West	East	Difference West-East
1^1-150	2	3	4	5	6
1–91	—	0	90	75	15
1–92	12	12	117	99	18
3–92	6	18	120	102	18
1–93	6	24	126	117	9
3–93	6	30	159	132	27
1–94	6	36	150	138	12
3–94	6	42	170	155	15
4–94	3	45	185	169	16
1–95	3	48	186	181	5
2–95	3	51	180	184	−4
3–95	3	54	175	186	−11
4–95	3	57	178	192	−14
1–96	3	60	186	200	−14
2–96	3	63	185	198	−13
3–96	3	66	186	201	−15
4–96	3	69	181	197	−16
1–97	3	72	178	189	−12
2–97	3	75	183	203	−20
3–97	3	78	184	199	−15
4–97	3	81	195	209	−14

↵1-150 Column 1, quarter measure was made (for example, 1–91=1st quarter of 1991); column 2, gap since the last measurement; column 3, time since the first measurement; columns 4/5, costs of dyspepsia drugs per head of population for that quarter; column 6, difference in costs between East and West.
The quarter in which the workshops were delivered is indicated in bold type.