Table 5.

Relationship between CTS severity, age and cost

	n	NHS cost (SD)	Exp(b) (95% CI)*	Societal cost (SD)	Exp (b) (95% CI)*
CTS-6
1.00	7	£512.83 (£405.61)		£726.02 (£776.80)
1.01–2.00	134	£434.04 (£212.53)		£559.37 (£430.53)
2.01–3.00	308	£422.57 (£220.30)		£554.73 (£492.25)
3.01–4.00	241	£466.50 (£348.74)		£686.11 (£814.25)
4.01–5.00	63	£511.52 (£273.65)	1.08 (1.03 to 1.12) p<0.01	£984.19 (£1197.94)	1.18 (1.10 to 1.27) p<0.0001
NCS grade
1	150	£483.36 (£456.12)		£629.69 (£608.90)
2	79	£459.44 (£243.93)		£592.70 (£381.55)
3	202	£438.50 (£213.31)		£657.58 (£755.06)
4	137	£414.14 (£153.80)		£578.23 (£597.95)
5	159	£439.38 (£203.02)		£676.24 (£892.99)
6	24	£467.71 (£237.77)	0.98 (0.96 to 1.01) p=0.269	£583.77 (£294.98)	1.01 (0.96 to 1.07) p=0.590
Age and CTS-6
Ages 18–40	43	£433.41 (£178.60)		£758.67 (£1099.72)
Ages 41–60	344	£444.53 (£226.94)	1.04 (0.88 to 1.22) p=0.679	£613.03 (£533.45)	0.83 (0.63 to 1.10) p=0.196
Ages 61–80	322	£451.96 (£336.62)	1.13 (0.94 to 1.36) p=0.190	£631.64 (£731.18)	0.90 (0.66 to 1.22) p=0.486
Ages 81+	44	£442.46 (£146.20)	1.16 (0.91 to 1.47) p=0.224	£712.66 (£973.69)	1.09 (0.73 to 1.62) p=0.690
Age and NCS grade
Ages 18–40	43	£433.41 (£178.60)		£758.67 (£1099.72)
Ages 41–60	343	£443.81 (£226.88)	1.02 (0.87 to 1.21) p=0.774	£608.42 (£527.83)	0.81 (0.60 to 1.09) p=0.163
Ages 61–80	321	£451.29 (£336.93)	1.11 (0.93 to 1.34) p=0.246	£629.87 (£730.63)	0.85 (0.61 to 1.18) p=0.336
Ages 81+	44	£442.46 (£146.20)	1.15 (0.90 to 1.47) p=0.252	£712.65 (£973.69)	0.99 (0.64 to 1.53) p=0.976

*Exponentiated parameter estimate (SE) from a generalised linear model with log-link and gamma distributed errors including gender, age, ethnicity, employment status, smoking status, units of alcohol per week, body mass index, bilateral CTS, comorbidities and comorbidity score.

CTS, carpal tunnel syndrome; NCS, nerve conduction studies; NHS, National Health Service.