Table 2.

Comparison of mean WBFPRS scores for pain between different study groups

	N	Mean	Std. deviation	Std. error	95% confidence interval for mean		Minimum	Maximum
					Lower bound	Upper bound
1	15	2.40	2.293	0.592	1.13	3.67	0	6
2	15	6.40	2.746	0.709	4.88	7.92	2	10
3	15	4.13	2.326	0.601	2.85	5.42	0	8
4	15	3.20	1.971	0.509	2.11	4.29	0	6
Total	60	4.03	2.743	0.345	3.32	4.74	0	10