Table 3.
Costs and frequency of replacement of spectacles and contact lenses to correct myopia
| Province | Variable | No. | Mean | SD | Median | Percentile | |
|---|---|---|---|---|---|---|---|
|
Anhui
|
Spectacles |
Cost per pair, discounted (CNY) |
1415 |
238.2 |
284.7 |
159.1 |
103.0-265.2 |
|
|
Frequency of replacement (Year) |
1968 |
2.1 |
1.6 |
2.0 |
1.0-3.0 |
|
|
|
Annual cost per person (CNY) |
1261 |
155.4 |
210.3 |
100.0 |
51.5-200.0 |
|
| OK and RGP lenses |
Cost per pair, discounted (CNY) |
11 |
4673.4 |
2546.3 |
4500.0 |
1500.0-6500.0 |
|
|
|
Frequency of replacement (Year) |
13 |
1.2 |
0.8 |
1.0 |
1.0-1.5 |
|
|
|
Annual cost for lenses (CNY) |
7 |
3107.1 |
1632.1 |
3000.0 |
1500.0-4500.0 |
|
|
|
Annual running cost (CNY) |
9 |
1726.7 |
1264.6 |
2100.0 |
480.0-2100.0 |
|
|
|
Annual cost per person (CNY) |
5 |
3762.0 |
2384.5 |
4500.0 |
1680.0-5100.0 |
|
| Soft contact lenses |
Annual cost per person (CNY) |
128 |
950.6 |
1166.7 |
480.0 |
180.0-1500.0 |
|
|
Shanghai
|
Spectacles |
Cost per pair, discounted (CNY) |
2135 |
555.4 |
1077.7 |
250.0 |
150.0-424.4 |
|
|
Frequency of replacement (Year) |
2330 |
2.4 |
1.8 |
2.0 |
1.0-3.0 |
|
|
|
Annual cost per person (CNY) |
1878 |
314.3 |
706.6 |
128.0 |
68.3-250.0 |
|
| OK and RGP lenses |
Cost per pair, discounted (CNY) |
57 |
5902.4 |
3511.0 |
5665.0 |
2575.0-8500.0 |
|
|
|
Frequency of replacement (Year) |
53 |
1.8 |
1.1 |
2.0 |
1.0-2.0 |
|
|
|
Annual cost for lenses (CNY) |
45 |
4189.3 |
4042.3 |
3250.0 |
1500.0-4500.0 |
|
|
|
Annual running costs (CNY) |
56 |
1610.4 |
1093.2 |
1500.0 |
720.0-2100.0 |
|
|
|
Annual cost per person (CNY) |
40 |
5822.1 |
4504.4 |
4870.0 |
2393.8-7700.0 |
|
| Soft contact lenses |
Annual cost per person (CNY) |
413 |
1740.2 |
2355.5 |
1500.0 |
480.0-2100.0 |
|
| Yunnan | Spectacles |
Cost per pair, discounted (CNY) |
1627 |
470.9 |
690.6 |
273.2 |
200.0-412.0 |
|
|
Frequency of replacement (Year) |
1645 |
2.3 |
1.8 |
2.0 |
1.0-3.0 |
|
|
|
Annual cost per person (CNY) |
1308 |
303.0 |
550.8 |
152.3 |
77.3-300.0 |
|
| OK and RGP lenses |
Cost per pair, discounted (CNY) |
38 |
6465.6 |
2739.8 |
5665.0 |
4635.0-8500.0 |
|
|
|
Frequency of replacement (Year) |
39 |
1.6 |
0.9 |
2.0 |
1.0-2.0 |
|
|
|
Annual cost for lenses (CNY) |
30 |
4007.5 |
2344.7 |
3390.4 |
2317.5-5500.0 |
|
|
|
Annual running costs (CNY) |
47 |
1703.0 |
1194.2 |
1500.0 |
720.0-2700.0 |
|
|
|
Annual cost per person (CNY) |
27 |
5669.7 |
3059.5 |
6132.5 |
2853.3-8050.0 |
|
| Soft contact lenses | Annual cost per person (CNY) | 156 | 1268.1 | 1462.6 | 1020.0 | 480.0-1500.0 |
OK – orthokeratology, RGP – rigid gas permeable, CNY – Chinese yuan, SD – standard deviation.