Table 4.

Mean quality-of-life scores at baseline and at follow-up adjusted for baseline scores with analysis of covariance.

	Baseline QoL score			6-week QoL score			6-month QoL score
Treatment	n	Mean	(95% CI)	n	Mean	(95% CI)	n	Mean	(95% CI)
Control	387	4.7	(4.4 to 4.9)	319	5.8	(5.4 to 6.1)	299	6.2	(5.8 to 6.6)
Intervention	358	4.8	(4.5 to 5.1)	283	5.9	(5.5 to 6.2)	243	6.4	(6.0 to 6.9)
						P = 0.73			P = 0.52

Analyses based on actual follow-up data. Quality of life based on difficulties arising in social, recreational, and domestic circumstances. A high score indicates better quality of life. QoL = quality of life.